fzus61 kbuf 270202
glflo 
expires:202608270900;;420078

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed aug 26 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 30.1 inch high will drift off the new england coast 
through tonight. a cold front will then cross the lower great lakes 
from west to east thursday. another 30.2 inch high will then build 
from the upper great lakes friday to the lower great lakes saturday 
before drifting off the new england coast sunday.


loz062-270900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt wed aug 26 2026

.overnight...southeast winds 5 to 15 knots becoming south.
a chance of showers late. waves 1 to 2 feet. 
.thursday...southwest winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely early, then a chance of showers late in
the morning. a chance of showers and thunderstorms early in the
afternoon. waves 1 to 3 feet. 
.thursday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.friday...north winds 10 knots or less becoming northwest. waves
2 feet or less. 
.friday night...west winds less than 10 knots. waves 1 foot or
less. 
.saturday...southwest winds 10 knots or less. waves 1 foot or
less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south. a chance
of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 270202
glflo 
expires:202608270900;;420079

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed aug 26 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 30.1 inch high will drift off the new england coast 
through tonight. a cold front will then cross the lower great lakes 
from west to east thursday. another 30.2 inch high will then build 
from the upper great lakes friday to the lower great lakes saturday 
before drifting off the new england coast sunday.


loz063>065-270900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed aug 26 2026

.overnight...southeast winds 10 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday...south winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...west winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms in the evening. waves 1 to
3 feet. 
.friday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.friday night...west winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.saturday...southwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south. a chance
of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270135
glfle 
expires:202608270830;;419632

open lake forecast for lake erie
national weather service cleveland oh
935 pm edt wed aug 26 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...
low pressure of 29.70 inches will pass north of the great lakes 
tonight and pull a cold front east across lake erie thursday. 
high pressure of 30.10 inches will build into the great lakes 
friday before settling to the mid-atlantic region sunday. a warm
front will move north across lake erie sunday night ahead of low
pressure approaching the western great lakes.


lez061-169-270830-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
935 pm edt wed aug 26 2026

.rest of tonight...south winds 10 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms after
midnight. a chance of waterspouts late. waves 1 to 3 feet. 
.thursday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of waterspouts in the morning. a chance of
showers with a slight chance of thunderstorms in the morning,
then a slight chance of showers and thunderstorms early in the
afternoon. waves 1 to 3 feet building to 2 to 4 feet. 
.thursday night...west winds 5 to 15 knots becoming north. a
chance of waterspouts overnight. a chance of showers overnight.
waves 1 to 3 feet. 
.friday...north winds 10 knots or less. waves 1 foot or less. 
.friday night...north winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers
sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots. a chance of showers
monday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270135
glfle 
expires:202608270830;;419630

open lake forecast for lake erie
national weather service cleveland oh
935 pm edt wed aug 26 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...
low pressure of 29.70 inches will pass north of the great lakes 
tonight and pull a cold front east across lake erie thursday. 
high pressure of 30.10 inches will build into the great lakes 
friday before settling to the mid-atlantic region sunday. a warm
front will move north across lake erie sunday night ahead of low
pressure approaching the western great lakes.


lez162>164-270830-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
935 pm edt wed aug 26 2026

.rest of tonight...southwest winds 10 to 15 knots. showers likely
with a chance of thunderstorms late this evening, then a slight
chance of showers and thunderstorms after midnight. waves 1 to
2 feet. 
.thursday...west winds 5 to 15 knots. waves 2 feet or less. 
.thursday night...west winds 5 to 10 knots becoming north. a
chance of showers in the evening. waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming northeast. waves
2 feet or less. 
.friday night...east winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...southwest winds 10 to 15 knots. waves 2 feet or less. 
.monday...southwest winds 10 to 15 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270135
glfle 
expires:202608270830;;419631

open lake forecast for lake erie
national weather service cleveland oh
935 pm edt wed aug 26 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...
low pressure of 29.70 inches will pass north of the great lakes 
tonight and pull a cold front east across lake erie thursday. 
high pressure of 30.10 inches will build into the great lakes 
friday before settling to the mid-atlantic region sunday. a warm
front will move north across lake erie sunday night ahead of low
pressure approaching the western great lakes.


lez165>168-270830-
vermilion to avon point oh beyond 5 nm 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-
935 pm edt wed aug 26 2026

.rest of tonight...south winds 10 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms late this
evening, then showers likely with a chance of thunderstorms after
midnight. a chance of showers with a slight chance of
thunderstorms late. a chance of waterspouts late. waves 1 to
3 feet building to 2 to 4 feet. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of waterspouts early. a chance of showers with a slight chance of
thunderstorms early. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 10 knots becoming north. a
chance of waterspouts overnight. a chance of showers overnight.
waves 2 feet or less. 
.friday...north winds 5 to 10 knots. waves 2 feet or less. 
.friday night...north winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...southwest winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 270056
glfsc 
expires:202608270900;;418121

lake st clair forecast
national weather service detroit/pontiac mi
856 pm edt wed aug 26 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...moderate northwest winds in place through daytime
thursday following the passage of a cold front. high pressure,
30.20 inches, then expands over the central great lakes to close
out the week.


lcz460-270900-
lake st clair-
856 pm edt wed aug 26 2026

.rest of tonight...southwest winds 10 to 15 knots. mostly cloudy
this evening becoming mostly clear. a chance of showers and
thunderstorms this evening. waves 2 feet or less.
.thursday...west winds 5 to 10 knots. partly sunny. waves 2 feet or
less.
.thursday night...northwest winds 5 to 10 knots becoming north 10 to
15 knots in the late evening and overnight. partly cloudy. waves 2
feet or less.
.friday...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and afternoon. mostly sunny. waves 2 feet or less.
.friday night...east winds 5 to 10 knots veering to the south after
midnight. clear. waves 2 feet or less.
.saturday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the evening. mostly sunny becoming partly cloudy. waves 2 feet or
less.
.sunday...south winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.
.monday...southwest winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 270056
glflh 
expires:202608270900;;418119

open lake forecast for lake huron
national weather service detroit/pontiac mi
856 pm edt wed aug 26 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...moderate northwest winds in place through daytime
thursday following the passage of a cold front. high pressure,
30.20 inches, then expands over the central great lakes to close
out the week.


lhz462>464-270900-
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-
856 pm edt wed aug 26 2026

.rest of tonight...south winds 10 to 15 knots veering to the
southwest early in the morning. showers and thunderstorms likely
this evening. a chance of waterspouts this evening. waves 2 to
4 feet subsiding to 1 to 3 feet after midnight. 
.thursday...west winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon...then veering to the west 5 to 10 knots
late in the afternoon. waves 1 to 3 feet. 
.thursday night...north winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight. 
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...light and variable winds becoming east 5 to
10 knots by midnight...then veering to the southeast after
midnight. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots late in the afternoon. waves 1 to 3 feet. 
.sunday...south winds 10 to 15 knots. a chance of showers. waves
1 to 3 feet. 
.monday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then decreasing to 5 to
10 knots . a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 270056
glflh 
expires:202608270900;;418117

open lake forecast for lake huron
national weather service detroit/pontiac mi
856 pm edt wed aug 26 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...moderate northwest winds in place through daytime
thursday following the passage of a cold front. high pressure,
30.20 inches, then expands over the central great lakes to close
out the week.


lhz361-270900-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
856 pm edt wed aug 26 2026

.rest of tonight...southwest winds 5 to 10 knots veering to the
west after midnight...then increasing to 10 to 15 knots early in
the morning. a chance of showers this evening. a chance of
waterspouts this evening. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 10 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet after midnight. 
.friday...northwest winds 5 to 10 knots backing to the west early
in the afternoon. waves 2 feet or less. 
.friday night...west winds 5 to 10 knots early in the evening
becoming light and variable...then becoming south 5 to 10 knots
after midnight. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. a chance of showers late
in the evening. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
. a chance of showers early in the morning. rain showers likely
in the late morning and early afternoon...then a chance of
showers . waves 2 feet or less. 
.monday...southeast winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and early afternoon...then
decreasing to 5 to 10 knots . a chance of showers. waves 1 to
3 feet. 


$$

fzus63 kdtx 270056
glflh 
expires:202608270900;;418118

open lake forecast for lake huron
national weather service detroit/pontiac mi
856 pm edt wed aug 26 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...moderate northwest winds in place through daytime
thursday following the passage of a cold front. high pressure,
30.20 inches, then expands over the central great lakes to close
out the week.


lhz362-363-270900-
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-
856 pm edt wed aug 26 2026

.rest of tonight...south winds 10 to 15 knots becoming southwest
5 to 10 knots after midnight...then becoming west 10 to 15 knots
early in the morning. a chance of showers and thunderstorms this
evening. a chance of waterspouts. waves 2 to 4 feet subsiding to
1 to 3 feet early in the morning. 
.thursday...northwest winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.thursday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots by midnight...then becoming northwest 10 to
15 knots after midnight. waves 2 to 4 feet. 
.friday...north winds 5 to 10 knots until late afternoon becoming
light and variable. waves 1 to 3 feet. 
.friday night...light and variable winds becoming south 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet. 
.sunday...south winds 10 to 15 knots becoming southeast 5 to
10 knots by midnight. a chance of showers. waves 1 to 3 feet. 
.monday...south winds 5 to 10 knots becoming southeast 10 to
15 knots in the late morning and early afternoon...then
decreasing to 5 to 10 knots . a chance of showers. waves 1 to
3 feet. 


$$

fzus63 kmkx 270206
glflm 
expires:202608270930;;420372

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
906 pm cdt wed aug 26 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...

modest northwest winds will continue tonight into thursday in the
wake of a cold front. winds then become light and variable
thursday night and friday as high pressure of 30.2 inches moves 
from the northern great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.8
inches will slowly approach from the great plains. modest to
breezy south winds will develop for the weekend. 



lmz261-362-364-366-563-565-567-868-270930-
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-
906 pm cdt wed aug 26 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northwest winds 10 to 15 kt increasing to
10 to 20 kt. isolated showers through early evening. waves 2 to
4 ft. 
.thursday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. waves 2 to 4 ft. 
.thursday night...northeast winds 15 to 25 kt diminishing to 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...northeast winds 10 to 15 kt veering to south. waves
1 to 2 ft. 
.friday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt becoming south to 25 kt. 
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.saturday night...south winds to 30 kt. chance of showers. waves
5 to 8 ft occasionally to 10 ft. 
.sunday...south winds 20 to 30 kt. chance of showers. waves 6 to 
9 ft occasionally to 12 ft. 
.monday...south winds 15 to 25 kt. chance of showers. waves 4 to
6 ft occasionally to 8 ft.  

$$

fzus63 kmkx 270206
glflm 
expires:202608270930;;420373

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
906 pm cdt wed aug 26 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...

modest northwest winds will continue tonight into thursday in the
wake of a cold front. winds then become light and variable
thursday night and friday as high pressure of 30.2 inches moves 
from the northern great lakes to the lower great lakes. 

high pressure then pulls east saturday and low pressure of 29.8
inches will slowly approach from the great plains. modest to
breezy south winds will develop for the weekend. 



lmz080-669-671-673-675-777-779-870-872-874-876-878-270930-
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-
906 pm cdt wed aug 26 2026

sheboygan wi to pentwater mi south...

.rest of tonight...west winds 10 to 15 kt becoming northwest
10 to 20 kt. isolated showers through early evening. waves 1 to
3 ft. 
.thursday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.thursday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt late in the evening, then diminishing to 5 to 10 kt
after midnight becoming east late. waves 1 to 3 ft subsiding to
1 to 2 ft. 
.friday...east winds 5 to 10 kt becoming southeast 10 to 15 kt.
waves 1 to 2 ft. 
.friday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt becoming south 20 to 30 
kt. waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.saturday night...south winds 20 to 30 kt. chance of showers. 
waves 4 to 7 ft occasionally to 9 ft. 
.sunday...south winds 20 to 30 kt. chance of showers. waves 6 to 
9 ft occasionally to 12 ft. 
.monday...southwest winds 15 to 25 kt becoming south. chance of
showers. waves 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420038

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz265-270800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt wed aug 26 2026

.rest of tonight...west winds 20 to 30 knots veering northwest
after midnight, then diminishing to 15 to 25 knots late. waves
1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. 
.thursday...north winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.thursday night...north winds 5 to 15 knots backing northwest
after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing east by mid afternoon.
waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.saturday night...south winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots veering southeast. a chance
of showers. a chance of thunderstorms. waves calm to 2 feet. 
.monday...southeast winds 15 to 25 knots veering southwest. a
chance of showers. waves building to 2 to 4 feet, then subsiding
to calm to 2 feet. 

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420039

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz266-270800-
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-
1000 pm edt wed aug 26 2026

...dense fog advisory in effect until 2 am edt thursday...

.rest of tonight...northwest winds 15 to 25 knots veering north
late. patchy fog. waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...north winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing northwest late. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet. 
.thursday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...south winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...southeast winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots veering south. a chance
of showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420040

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz267-270800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt wed aug 26 2026

...dense fog advisory in effect until 7 am edt thursday...

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

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420035

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz162-270800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed aug 26 2026 /900 pm cdt wed aug 26 2026/

.rest of tonight...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest in
the afternoon, then backing southeast late. waves calm to 2 feet.
.thursday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots backing northeast after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.saturday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of showers. waves calm to
2 feet. 
.sunday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.monday...east winds 15 to 25 knots becoming west 10 to 20 knots.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420036

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz263-270800-
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-
1000 pm edt wed aug 26 2026

.rest of tonight...northwest winds 10 to 20 knots veering north
late. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering northeast late. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds less than 10 knots backing north
late. waves calm to 2 feet. 
.friday...east winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots diminishing to 5 to 15 knots.
a chance of showers. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming west 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 270201
glfls 
expires:202608270800;;420037

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed aug 26 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 29.7 inch low near james bay will continue to lift northeast as a 
a 30.1 inch high pressure over manitoba starts stretching towards 
lake superior. this high moves over the lake by friday morning 
before continuing into new england on saturday. saturday night, a 
low pressure over the central to northern plains deepens to 29.6 
inches. this low approaches the great lakes by early next week, with 
heights over lake superior falling to 29.8 inches by monday 
afternoon.




lsz264-270800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt wed aug 26 2026

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

$$