fzus61 kbuf 240802
glflo 
expires:202608241500;;269642

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon aug 24 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...behind a recently departed cold front, a trough 
averaging 29.8 inches will linger over the lake today. 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. on friday, a cold front should sweep eastward 
across the lake and be followed by a high pressure ridge averaging 
30.0 inches and building from the upper midwest.


loz062-241500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt mon aug 24 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 240802
glflo 
expires:202608241500;;269643

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt mon aug 24 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...behind a recently departed cold front, a trough 
averaging 29.8 inches will linger over the lake today. 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. on friday, a cold front should sweep eastward 
across the lake and be followed by a high pressure ridge averaging 
30.0 inches and building from the upper midwest.


loz063>065-241500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt mon aug 24 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240738
glfle 
expires:202608241415;;268998

open lake forecast for lake erie
national weather service cleveland oh
338 am edt mon aug 24 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 trough averaging 29.90 will linger over the eastern great lakes
today, followed by high pressure 30.00 inches monday night into 
wednesday. low pressure 29.80 inches will track through the
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 will return on friday.


lez162-163-241415-
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-
338 am edt mon aug 24 2026

.today...northwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming south. waves
1 foot or less. 
.tuesday night...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms wednesday night. waves 2 feet or less. 
.thursday...southwest winds 5 to 10 knots becoming northwest.
waves 1 foot or less. 
.friday...northwest winds 10 knots or less becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240738
glfle 
expires:202608241415;;268999

open lake forecast for lake erie
national weather service cleveland oh
338 am edt mon aug 24 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 trough averaging 29.90 will linger over the eastern great lakes
today, followed by high pressure 30.00 inches monday night into 
wednesday. low pressure 29.80 inches will track through the
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 will return on friday.


lez164-165-241415-
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-
338 am edt mon aug 24 2026

.today...northwest winds 15 to 20 knots becoming west. waves 3 to
5 feet. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
2 to 4 feet subsiding to 1 to 2 feet. 
.tuesday...northwest winds 10 knots or less. waves 1 foot or
less. 
.tuesday night...south winds 10 knots or less. waves 1 foot or
less. 
.wednesday...south winds 10 to 15 knots becoming southwest. a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 
.thursday...southwest winds 5 to 15 knots becoming west 10 knots
or less. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240738
glfle 
expires:202608241415;;269000

open lake forecast for lake erie
national weather service cleveland oh
338 am edt mon aug 24 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 trough averaging 29.90 will linger over the eastern great lakes
today, followed by high pressure 30.00 inches monday night into 
wednesday. low pressure 29.80 inches will track through the
northern great lakes wednesday into thursday, pulling a cold front
across the lake. high pressure 30.10 will return on friday.


lez061-166>169-241415-
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-
338 am edt mon aug 24 2026

.today...west winds 15 to 25 knots. a chance of waterspouts. a
chance of showers with a slight chance of thunderstorms. waves
3 to 6 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.tonight...west winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. a chance of waterspouts through
the early overnight. a chance of showers early, then a slight
chance of showers from late evening on. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.tuesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.tuesday night...west winds 5 to 10 knots becoming south. waves
1 foot or less. 
.wednesday...south winds 5 to 15 knots. a chance of showers and
thunderstorms wednesday night. waves 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers. waves 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots becoming northeast. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 240714
glflh 
expires:202608242000;;268404

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am edt mon aug 24 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 maintains breezy
conditions today. lingering chances for some rain showers this
morning with showers tapering off tonight as high pressure, 30.10
inches, begins to build in.


lhz362-363-242000-
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-
314 am edt mon aug 24 2026

.today...northwest winds 20 to 25 knots with gusts to around
30 knots. a chance of showers in the morning. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.tonight...northwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 5 to 7 feet subsiding to 3 to 5 feet early in the
morning. waves occasionally around 10 feet. 
.tuesday...northwest winds 5 to 10 knots becoming light and
variable. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
morning and afternoon. 
.tuesday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. waves 2 feet or
less. 
.wednesday...south winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots late in the morning...then
decreasing to 10 to 15 knots late in the afternoon. a chance of
showers. a chance of thunderstorms late in the afternoon. rain
showers likely late in the afternoon. waves 1 to 3 feet building
to 4 to 6 feet. waves occasionally around 8 feet. 
.thursday...west winds 5 to 10 knots becoming northwest 10 to
15 knots . waves 3 to 5 feet subsiding to 2 to 4 feet in the late
morning and early afternoon...then building to 3 to 5 feet . 
.friday...northwest winds 10 to 15 knots becoming north 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet . 


$$

fzus63 kdtx 240714
glflh 
expires:202608242000;;268405

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am edt mon aug 24 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 maintains breezy
conditions today. lingering chances for some rain showers this
morning with showers tapering off tonight as high pressure, 30.10
inches, begins to build in.


lhz462>464-242000-
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-
314 am edt mon aug 24 2026

.today...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 afternoon. a chance of showers in the morning. waves 8 to
12 feet. waves occasionally around 15 feet. 
.tonight...northwest winds 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.tuesday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.tuesday night...northeast winds 5 to 10 knots veering to the
south by midnight...then increasing to 10 to 15 knots after
midnight. waves 2 feet or less. 
.wednesday...south winds 10 to 15 knots. a chance of showers late
in the morning. a chance of thunderstorms late in the afternoon.
rain showers likely late in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet. 
.thursday...southwest winds 5 to 10 knots veering to the north .
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots becoming north 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet . 


$$

fzus63 kdtx 240714
glflh 
expires:202608242000;;268403

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am edt mon aug 24 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 maintains breezy
conditions today. lingering chances for some rain showers this
morning with showers tapering off tonight as high pressure, 30.10
inches, begins to build in.


lhz361-242000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
314 am edt mon aug 24 2026

.today...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. 
.tonight...northwest winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 3 to 5 feet subsiding to 1 to
3 feet after midnight. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...southwest winds 5 to 10 knots backing to the
southeast by midnight...then becoming south 10 to 15 knots after
midnight. a chance of showers after midnight. waves 2 feet or
less. 
.wednesday...south winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon...then becoming west 10 to
15 knots late in the evening. a chance of showers in the
morning...then showers and a chance of thunderstorms late in the
morning. rain showers likely late in the evening. waves 1 to
3 feet building to 3 to 5 feet. 
.thursday...northwest winds 10 to 15 knots. waves 2 to 4 feet
building to 3 to 5 feet . 
.friday...northwest winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 240713
glfsc 
expires:202608242000;;268401

lake st clair forecast
national weather service detroit/pontiac mi
313 am edt mon aug 24 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 maintains breezy
conditions today. lingering chances for some showers this
morning with showers tapering off tonight as high pressure, 30.10
inches, begins to build in.


lcz460-242000-
lake st clair-
313 am edt mon aug 24 2026

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

$$

fzus63 kmkx 240806
glflm 
expires:202608241530;;269876

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt mon aug 24 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...

low pressure around 29.6 inches in eastern ontario will linger 
through this evening, resulting in breezy northwest winds across 
the northern third of lake michigan. high pressure around 30.1 
inches drift across wisconsin and lake michigan through tuesday
afternoon and winds will diminish and become light and variable. 
look for south to southwest winds to develop over the lake tuesday
afternoon as the high shifts into ontario and 29.7 inch low 
pressure approaches from the northern great plains tuesday night 
into wednesday. 

the low will cross lake michigan wednesday afternoon, bringing a 
breezy northwest wind shift, but gales are not expected as this 
occurs. showers and thunderstorms will accompany the 
approaching/passing surface low tuesday night into wednesday 
afternoon, but they are not expected to be severe. the next area 
of 30.1 inch high pressure will gradually build toward lake 
michigan from the northern great plains wednesday night through 
friday.


lmz261-362-364-366-563-565-567-868-241530-
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-
306 am cdt mon aug 24 2026

sheboygan wi to pentwater mi north...

.today...northwest winds to 30 kt becoming north 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.tonight...north winds 10 to 20 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday...south winds 5 to 10 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.tuesday night...south winds 15 to 25 kt. chance of showers
overnight. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday...south winds to 30 kt becoming southwest. chance of
showers. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday night...west winds 15 to 25 kt becoming northwest
10 to 20 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.thursday...northwest winds 15 to 25 kt increasing to 30 kt.
waves 1 to 3 ft. 
.friday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 240806
glflm 
expires:202608241530;;269877

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am cdt mon aug 24 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...

low pressure around 29.6 inches in eastern ontario will linger 
through this evening, resulting in breezy northwest winds across 
the northern third of lake michigan. high pressure around 30.1 
inches drift across wisconsin and lake michigan through tuesday
afternoon and winds will diminish and become light and variable. 
look for south to southwest winds to develop over the lake tuesday
afternoon as the high shifts into ontario and 29.7 inch low 
pressure approaches from the northern great plains tuesday night 
into wednesday. 

the low will cross lake michigan wednesday afternoon, bringing a 
breezy northwest wind shift, but gales are not expected as this 
occurs. showers and thunderstorms will accompany the 
approaching/passing surface low tuesday night into wednesday 
afternoon, but they are not expected to be severe. the next area 
of 30.1 inch high pressure will gradually build toward lake 
michigan from the northern great plains wednesday night through 
friday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-241530-
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-
306 am cdt mon aug 24 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.tonight...north winds 10 to 20 kt diminishing to 5 to 10 kt late
in the evening, then becoming west after midnight becoming west
5 to 10 kt late. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.tuesday...southwest winds 5 to 10 kt increasing to 10 to 15 kt
late in the morning, then becoming south 10 to 20 kt in the
afternoon. waves 1 to 3 ft building to 3 to 5 ft. 
.tuesday night...south winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...southwest winds to 30 kt. chance of showers in the
afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday night...southwest winds 15 to 25 kt becoming west
10 to 20 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.thursday...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.friday...north winds 10 to 15 kt. waves 1 to 2 ft.  

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269385

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz266-242000-
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-
356 am edt mon aug 24 2026

.early this morning...north winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...north winds 15 to 25 knots backing northwest in the
afternoon, then diminishing to 10 to 20 knots late. waves
subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast 15 to
25 knots late. a slight chance of showers and thunderstorms by
mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...south winds 15 to 25 knots. showers and a chance
of thunderstorms. waves building to 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots veering west by mid
afternoon. showers likely through early afternoon. waves
subsiding to 1 to 3 feet. 
.wednesday night...west winds 15 to 25 knots veering northwest
after midnight. waves building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269386

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz267-242000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
356 am edt mon aug 24 2026

.early this morning...northwest winds 20 to 30 knots. waves 5 to
8 feet occasionally to 10 feet. 
.today...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. showers and a chance of thunderstorms.
waves building to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. showers. waves subsiding to calm to
2 feet. 
.wednesday night...west winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269382

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz263-242000-
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-
356 am edt mon aug 24 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast late. a
chance of showers. a chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. showers through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves calm to
2 feet. 
.wednesday...west winds 15 to 25 knots. a chance of showers.
waves building to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269383

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz264-242000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
356 am edt mon aug 24 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...north winds 5 to 15 knots backing west late. waves calm
to 2 feet. 
.tonight...west winds 5 to 15 knots diminishing to less than
10 knots after midnight, then becoming south 5 to 15 knots late.
waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast in the
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
building to 1 to 3 feet. 
.wednesday...west winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.thursday...northwest winds 10 to 20 knots becoming north 5 to
15 knots. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269381

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
356 am edt mon aug 24 2026 /256 am cdt mon aug 24 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots becoming south 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming northeast less than
10 knots after midnight, then veering east late. patchy fog after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots veering south in the
afternoon, then backing east late. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots backing west after
midnight. a chance of thunderstorms through midnight. a chance of
showers. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 240756
glfls 
expires:202608242000;;269384

open lake forecast for lake superior
national weather service marquette mi
356 am edt mon aug 24 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...

a 30.1 inch high pressure moves through the western great lakes 
today before moving into the ohio river valley by tonight.
meanwhile, 29.7 inch clipper low pressure over saskatchewan this 
morning moves over lake winnipeg on tuesday. this clipper moves over 
lake superior tuesday night before lifting away towards james bay 
and northern quebec wednesday night into thursday morning. 30.0 inch 
high pressure ridging returns to lake superior by thursday 
afternoon, increasing to 30.2 inches thursday night into friday as 
the high's center moves overhead. 




lsz265-242000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
356 am edt mon aug 24 2026

.early this morning...northwest winds 15 to 25 knots. waves 2 to
4 feet. 
.today...northwest winds 15 to 25 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots backing south late. waves
calm to 2 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a chance of showers and a slight chance of thunderstorms by
mid afternoon. waves calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...west winds 15 to 25 knots. a chance of showers.
waves building to 1 to 3 feet. 
.wednesday night...west winds 15 to 25 knots veering northwest
after midnight. waves building to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday...north winds 10 to 20 knots becoming south 5 to
15 knots. waves calm to 2 feet. 

$$