fzus61 kbuf 230202
glflo 
expires:202608230900;;199155

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat aug 22 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 29.6 inch low should wobble northeastward from the 
central great lakes to southwestern quebec through monday. in 
response to the low's track, a warm front drifts northeastward 
across lake ontario tonight and then a cold front sweeps eastward 
across the lake overnight tonight through sunday. behind the cold 
front, a trough averaging 29.8 inches lingers over lake ontario 
through monday. on tuesday through wednesday, a ridge averaging 
30.1 inches builds from the western and central great lakes. the 
ridge should begin to exit eastward on thursday and allow a warm 
front to sweep northeastward across lake ontario.


loz062-230900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt sat aug 22 2026

.overnight...south winds 10 to 15 knots. showers with a
chance of thunderstorms. waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming west. a chance
of waterspouts. showers likely early, then a chance of showers
late in the morning. showers likely with a chance of
thunderstorms in the afternoon. waves 1 to 3 feet building to
3 to 6 feet. 
.sunday night...west winds 15 to 20 knots. a chance of
waterspouts. showers likely with a chance of thunderstorms in the
evening, then showers overnight. waves 4 to 6 feet. 
.monday...southwest winds 15 to 25 knots becoming west. a chance
of waterspouts. showers. waves 5 to 8 feet. waves occasionally
around 10 feet. 
.monday night...west winds 15 to 20 knots. a chance of
waterspouts. showers likely in the evening, then a chance of
showers overnight. waves 4 to 7 feet subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.tuesday...west winds 15 to 20 knots diminishing to 10 knots or
less. a chance of waterspouts during the day. showers likely
during the day. waves 2 to 4 feet subsiding to 1 foot or less. 
.wednesday...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.thursday...south winds 5 to 10 knots becoming southwest. a
chance of showers and thunderstorms. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 230202
glflo 
expires:202608230900;;199156

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat aug 22 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 29.6 inch low should wobble northeastward from the 
central great lakes to southwestern quebec through monday. in 
response to the low's track, a warm front drifts northeastward 
across lake ontario tonight and then a cold front sweeps eastward 
across the lake overnight tonight through sunday. behind the cold 
front, a trough averaging 29.8 inches lingers over lake ontario 
through monday. on tuesday through wednesday, a ridge averaging 
30.1 inches builds from the western and central great lakes. the 
ridge should begin to exit eastward on thursday and allow a warm 
front to sweep northeastward across lake ontario.


loz063>065-230900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sat aug 22 2026

.overnight...south winds 15 to 25 knots. showers with a
chance of thunderstorms. waves 1 to 3 feet building to 3 to
5 feet. 
.sunday...south winds 15 to 25 knots becoming west. a chance of
waterspouts. showers with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms early in the
afternoon. showers with a chance of thunderstorms late. waves
3 to 5 feet building to 3 to 6 feet. 
.sunday night...west winds 15 to 20 knots becoming southwest. a
chance of waterspouts. showers with a chance of thunderstorms in
the evening, then showers overnight. waves 3 to 6 feet building
to 4 to 7 feet. waves occasionally around 9 feet. 
.monday...southwest winds 15 to 25 knots. a chance of
waterspouts. showers. waves 5 to 8 feet building to 6 to 9 feet.
waves occasionally around 11 feet. 
.monday night...west winds 15 to 20 knots. a chance of
waterspouts. showers. waves 5 to 9 feet subsiding to 3 to 6 feet.
waves occasionally around 11 feet. 
.tuesday...west winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of waterspouts. showers during the day, then a
chance of showers tuesday night. waves 3 to 6 feet subsiding to
1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming south. waves
2 feet or less. 
.thursday...south winds 5 to 15 knots. a chance of showers during
the day, then showers likely thursday night. waves 2 feet or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230140
glfle 
expires:202608230815;;198680

open lake forecast for lake erie
national weather service cleveland oh
940 pm edt sat aug 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front will move east through the area late this evening. a
trough averaging 29.80 will linger over the eastern great lakes 
sunday into monday morning. high pressure 30.00 inches will 
gradually build into the region monday afternoon through tuesday 
before departing to the east on wednesday. low pressure 29.80 
inches moves across the northern great lakes wednesday into 
thursday.


lez164-165-230815-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
940 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots. a chance of
waterspouts. a chance of showers and thunderstorms late this
evening, then a slight chance of showers and thunderstorms after
midnight. waves 2 to 4 feet. 
.sunday...northwest winds 15 to 20 knots becoming west. a chance
of waterspouts in the afternoon. a slight chance of showers early
in the afternoon. a chance of showers with a slight chance of
thunderstorms late. waves 3 to 5 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest. a
chance of waterspouts in the evening. a chance of showers in the
evening. waves 3 to 5 feet. 
.monday...northwest winds 15 to 20 knots becoming west. waves
3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...west winds 15 to 20 knots becoming northwest
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...northwest winds 10 knots or less becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots. a chance of showers
wednesday night. waves 2 feet or less. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms during the day, then a chance of
showers thursday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230140
glfle 
expires:202608230815;;198681

open lake forecast for lake erie
national weather service cleveland oh
940 pm edt sat aug 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front will move east through the area late this evening. a
trough averaging 29.80 will linger over the eastern great lakes 
sunday into monday morning. high pressure 30.00 inches will 
gradually build into the region monday afternoon through tuesday 
before departing to the east on wednesday. low pressure 29.80 
inches moves across the northern great lakes wednesday into 
thursday.


lez061-166>169-230815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
940 pm edt sat aug 22 2026

.rest of tonight...west winds 15 to 20 knots becoming northwest.
a chance of waterspouts. showers likely with a chance of
thunderstorms late this evening, then a chance of showers and
thunderstorms after midnight. waves 2 to 4 feet building to 3 to
5 feet. 
.sunday...northwest winds 15 to 20 knots becoming west. a chance
of waterspouts. a chance of showers with a slight chance of
thunderstorms through early afternoon, then a chance of showers
and thunderstorms late. waves 3 to 6 feet. 
.sunday night...west winds 15 to 25 knots. a chance of
waterspouts. showers likely with a chance of thunderstorms in the
evening, then a chance of showers overnight. waves 3 to 6 feet. 
.monday...west winds 15 to 25 knots. a chance of waterspouts. a
chance of showers. waves 4 to 7 feet. waves occasionally around
9 feet. 
.monday night...west winds 15 to 20 knots becoming northwest
10 to 15 knots. a chance of waterspouts in the evening. waves
3 to 6 feet subsiding to 1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.wednesday...south winds 5 to 15 knots. a chance of showers
wednesday night. waves 2 feet or less. 
.thursday...south winds 5 to 15 knots becoming west. a chance of
showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230140
glfle 
expires:202608230815;;198679

open lake forecast for lake erie
national weather service cleveland oh
940 pm edt sat aug 22 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
a cold front will move east through the area late this evening. a
trough averaging 29.80 will linger over the eastern great lakes 
sunday into monday morning. high pressure 30.00 inches will 
gradually build into the region monday afternoon through tuesday 
before departing to the east on wednesday. low pressure 29.80 
inches moves across the northern great lakes wednesday into 
thursday.


lez162-163-230815-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
940 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots. a chance of
waterspouts late this evening. a chance of showers and
thunderstorms late this evening. waves 1 to 3 feet. 
.sunday...northwest winds 15 to 20 knots becoming west. a chance
of waterspouts in the afternoon. a slight chance of showers early
in the afternoon. a chance of showers with a slight chance of
thunderstorms late. waves 2 to 4 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
waterspouts in the evening. a chance of showers in the evening.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...northwest winds 15 to 20 knots becoming west. waves
1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.tuesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots. a chance of showers
wednesday night. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms during the day. waves 1 foot
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 230130
glfsc 
expires:202608230930;;198461

lake st clair forecast
national weather service detroit/pontiac mi
930 pm edt sat aug 22 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...post-frontal northwest flow brings breezy conditions
through monday. chances for some showers and an isolated
thunderstorm will return this afternoon and evening, favored
across lake huron, high pressure, 30.10 inches, willl move over
the great lakes late tomorrow into tuesday.


lcz460-230930-
lake st clair-
930 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots. partly cloudy.
waves 1 to 3 feet.
.sunday...northwest winds 15 to 20 knots diminishing to 10 to 15
knots late in the afternoon. partly sunny. a chance of light showers
in the afternoon. waves 1 to 3 feet.
.sunday night...northwest winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. partly cloudy. a chance
of light showers early in the evening. waves 1 to 3 feet.
.monday...west winds 10 to 15 knots. mostly sunny. waves 2 feet or
less.
.monday night...northwest winds 10 to 15 knots diminishing to 5 to
10 knots in the late evening and overnight. mostly clear. waves 2
feet or less.
.tuesday...northwest winds 5 to 10 knots in the morning becoming
light and variable...then becoming south 5 to 10 knots in the
evening. mostly clear. waves 2 feet or less.
.wednesday...south winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.thursday...west winds 10 to 15 knots. partly cloudy. a chance of
showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 230130
glflh 
expires:202608230930;;198446

open lake forecast for lake huron
national weather service detroit/pontiac mi
930 pm edt sat aug 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...post-frontal northwest flow brings breezy conditions
through monday. chances for some rain showers and an isolated
thunderstorm will return this afternoon and evening, favored
across lake huron, high pressure, 30.10 inches, willl move over
the great lakes late tomorrow into tuesday.


lhz361-230930-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
930 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the late morning and
afternoon. waves 5 to 7 feet. waves occasionally around 10 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots. a chance of showers. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.monday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and afternoon. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday night...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet after
midnight. 
.tuesday...west winds 5 to 10 knots becoming light and variable...
then becoming south 5 to 10 knots late in the evening. waves
2 feet or less. 
.wednesday...south winds 5 to 10 knots backing to the southeast .
a chance of showers early in the morning...then showers likely.
waves 1 to 3 feet. 
.thursday...southeast winds 5 to 10 knots becoming southwest
10 to 15 knots until early evening...then veering to the
northwest by midnight. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 230130
glflh 
expires:202608230930;;198447

open lake forecast for lake huron
national weather service detroit/pontiac mi
930 pm edt sat aug 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...post-frontal northwest flow brings breezy conditions
through monday. chances for some rain showers and an isolated
thunderstorm will return this afternoon and evening, favored
across lake huron, high pressure, 30.10 inches, willl move over
the great lakes late tomorrow into tuesday.


lhz362-363-230930-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
930 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots increasing to
20 to 25 knots after midnight. a chance of showers this evening.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots. a chance of waterspouts in the morning. waves 8 to
12 feet. waves occasionally around 15 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots. a chance of waterspouts in the evening. a chance
of showers. waves 8 to 12 feet. waves occasionally around
15 feet. 
.monday...northwest winds 20 to 25 knots decreasing to 15 to
20 knots early in the afternoon. gusts to 30 knots. a chance of
showers in the morning. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.monday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and overnight. waves 4 to
6 feet. 
.tuesday...northwest winds 5 to 10 knots becoming light and
variable...then becoming southeast 5 to 10 knots late in the
evening. waves 2 to 4 feet subsiding to 2 feet or less. waves
occasionally around 8 feet. 
.wednesday...south winds 5 to 10 knots becoming southeast 10 to
15 knots. a chance of showers in the late morning and early
afternoon. rain showers likely . waves 1 to 3 feet building to
2 to 4 feet . 
.thursday...south winds 10 to 15 knots becoming southwest 5 to
10 knots until early evening...then becoming northwest 10 to
15 knots by midnight. a chance of showers. waves 2 to 4 feet
subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 230130
glflh 
expires:202608230930;;198448

open lake forecast for lake huron
national weather service detroit/pontiac mi
930 pm edt sat aug 22 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...post-frontal northwest flow brings breezy conditions
through monday. chances for some rain showers and an isolated
thunderstorm will return this afternoon and evening, favored
across lake huron, high pressure, 30.10 inches, willl move over
the great lakes late tomorrow into tuesday.


lhz462>464-230930-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
930 pm edt sat aug 22 2026

.rest of tonight...northwest winds 15 to 20 knots. a chance of
showers and thunderstorms this evening...then a chance of showers
after midnight. waves 2 to 4 feet building to 5 to 7 feet after
midnight. waves occasionally around 10 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots late in the afternoon. a chance of showers in the
morning...then a chance of showers and thunderstorms in the
afternoon. waves 8 to 12 feet. waves occasionally around 15 feet.
.sunday night...northwest winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots in the late evening
and overnight. a chance of showers and thunderstorms in the
evening...then a chance of showers after midnight. waves 8 to
12 feet. waves occasionally around 15 feet. 
.monday...west winds 20 to 25 knots with gusts to around 30 knots
becoming northwest 15 to 20 knots with gusts to around 30 knots
in the late morning and afternoon. a chance of showers in the
morning. waves 6 to 9 feet. waves occasionally around 12 feet. 
.monday night...northwest winds 10 to 15 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.tuesday...northwest winds 5 to 10 knots becoming light and
variable...then becoming southeast 5 to 10 knots late in the
evening. waves 2 to 4 feet subsiding to 2 feet or less. 
.wednesday...south winds 5 to 10 knots increasing to 10 to
15 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet by midnight. 
.thursday...south winds 10 to 15 knots becoming southwest 5 to
10 knots until early evening...then veering to the west by
midnight. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 


$$

fzus63 kmkx 230222
glflm 
expires:202608230930;;200100

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
922 pm cdt sat aug 22 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

isolated showers and storms will remain possible over the lake tonight
into at least early sunday, with a small chance for an isolated 
waterspout through tonight. otherwise, breezy north to northwest 
winds will persist into sunday between deepening low pressure 
around 29.7 inches over the eastern great lakes and high pressure 
of 30.2 inches building in from the northwest. winds will 
eventually become lighter by mid-day monday, persisting into 
tuesday as the high moves overhead. breezy southerly winds will 
then develop later tuesday into wednesday as the high shifts 
eastward ahead of an approaching low. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-230930-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
922 pm cdt sat aug 22 2026

sheboygan wi to pentwater mi south...

.rest of tonight...north winds 10 to 20 kt. slight chance of
showers late this evening. slight chance of waterspouts. waves
2 to 4 ft building to 3 to 5 ft. 
.sunday...northwest winds 15 to 25 kt becoming north. slight
chance of waterspouts in the morning. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.monday...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday night...northeast winds 10 to 15 kt veering to south.
waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt increasing to 15 to 25 kt in
the afternoon. waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.thursday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft.  

$$

fzus63 kmkx 230222
glflm 
expires:202608230930;;200099

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
922 pm cdt sat aug 22 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

isolated showers and storms will remain possible over the lake tonight
into at least early sunday, with a small chance for an isolated 
waterspout through tonight. otherwise, breezy north to northwest 
winds will persist into sunday between deepening low pressure 
around 29.7 inches over the eastern great lakes and high pressure 
of 30.2 inches building in from the northwest. winds will 
eventually become lighter by mid-day monday, persisting into 
tuesday as the high moves overhead. breezy southerly winds will 
then develop later tuesday into wednesday as the high shifts 
eastward ahead of an approaching low. 


lmz261-362-364-366-563-565-567-868-230930-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
922 pm cdt sat aug 22 2026

sheboygan wi to pentwater mi north...

.rest of tonight...north winds 15 to 25 kt becoming northwest.
slight chance of waterspouts. waves 4 to 6 ft occasionally to
8 ft. 
.sunday...northwest winds 15 to 25 kt becoming north to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday night...north winds to 30 kt becoming northwest 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.monday...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.monday night...north winds 15 to 25 kt backing to west 5 to
10 kt overnight. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday...southwest winds 10 to 15 kt increasing to 15 to 25 kt
in the afternoon. waves 1 ft or less building to 2 to 4 ft. 
.tuesday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt becoming south to 30 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.thursday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199061

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat aug 22 2026 /901 pm cdt sat aug 22 2026/

.rest of tonight...north winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming south less than
10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots backing north
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199062

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz263-230800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt sat aug 22 2026

.rest of tonight...north winds 10 to 20 knots. waves calm to
2 feet building to 1 to 3 feet. 
.sunday...north winds 10 to 20 knots becoming west 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest late.
waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots veering south
after midnight. showers likely and a chance of thunderstorms.
waves calm to 2 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199063

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz264-230800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt sat aug 22 2026

.rest of tonight...north winds 15 to 25 knots diminishing to
10 to 20 knots late. waves 1 to 3 feet building to 2 to 4 feet. 
.sunday...north winds 10 to 20 knots backing northwest late.
waves subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots. a chance of
showers through midnight. a chance of thunderstorms. showers
likely after midnight. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199064

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz265-230800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt sat aug 22 2026

.rest of tonight...north winds 20 to 30 knots. a slight chance of
showers by midnight. waves 2 to 4 feet building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots backing northwest late. a
slight chance of showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet. 
.monday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. showers likely. waves calm to
2 feet. 
.wednesday...southwest winds 10 to 20 knots veering northwest. a
chance of showers. waves building to 1 to 3 feet. 
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199065

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz266-230800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt sat aug 22 2026

.rest of tonight...north winds 20 to 30 knots. waves 3 to 6 feet
occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots backing northwest late. a
slight chance of showers. waves building to 4 to 8 feet
occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday...northwest winds 15 to 25 knots. waves subsiding to 1 to
3 feet. 
.monday night...northwest winds 5 to 15 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. a chance of showers through
midnight. showers likely after midnight. waves building to 1 to
3 feet. 
.wednesday...south winds 10 to 20 knots backing north. showers
likely. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.thursday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202608230800;;199066

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sat aug 22 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

pressure rises continue over lake superior behind an exiting 29.9 
inch trough. this is followed by 30.1 inch ridging for the latter 
part of the weekend into early next week via a 30.2 inch parent high 
from the canadian prairies that drops down into the ohio river 
valley by late monday, weakening to 30.1 inches as it does so. a 
29.7 inch low over the canadian prairies monday night then drops 
southeast towards lake superior, arriving early wednesday morning. 
the low shifts east wednesday night with weak ridging of 29.9 inches 
building over the lake on thursday.




lsz267-230800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt sat aug 22 2026

.rest of tonight...northwest winds 20 to 30 knots veering north
after midnight. waves 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 20 to 30 knots backing northwest in the
afternoon, then increasing to 30 knots with a few gale force
gusts to 35 knots possible late. a slight chance of showers.
waves building to 5 to 8 feet occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots. waves subsiding
to 3 to 6 feet occasionally to 8 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.monday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of showers. waves calm to
2 feet. 
.wednesday...southeast winds 10 to 20 knots. showers likely. a
chance of showers. waves building to 1 to 3 feet, then subsiding
to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$