fzus61 kbuf 270802
glflo 
expires:202608271500;;434460

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu aug 27 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 pre-frontal trough will cross the lower great lakes 
today, followed by a weak cold front tonight. a 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. a 
weak frontal boundary is then forecast to stall just north of the 
lake sunday night through tuesday.


loz063>065-271500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu aug 27 2026

.today...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely with a chance of thunderstorms this
morning, then a chance of showers this afternoon. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming northwest. a chance
of waterspouts late. waves 1 to 2 feet. 
.friday...north winds 5 to 10 knots becoming northwest. a chance
of waterspouts in the morning. waves 2 feet or less. 
.friday night...northwest winds less than 10 knots becoming west.
waves 1 foot or less. 
.saturday...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.sunday...southwest winds 5 to 15 knots. showers likely sunday
night. waves 2 feet or less. 
.monday...south winds 5 to 10 knots becoming east. showers likely
during the day, then a chance of showers monday night. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 270802
glflo 
expires:202608271500;;434459

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu aug 27 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 pre-frontal trough will cross the lower great lakes 
today, followed by a weak cold front tonight. a 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. a 
weak frontal boundary is then forecast to stall just north of the 
lake sunday night through tuesday.


loz062-271500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt thu aug 27 2026

.today...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms early. waves 1 to 3 feet. 
.tonight...west winds 5 to 10 knots becoming northwest. waves
1 to 2 feet. 
.friday...north winds 10 knots or less becoming west. waves
1 foot or less. 
.friday night...light and variable winds. waves 1 foot or less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.sunday...southwest winds 5 to 10 knots becoming south. a chance
of showers during the day, then showers likely sunday night.
waves 1 foot or less. 
.monday...south winds 5 to 10 knots becoming southeast. showers
likely during the day, then a chance of showers monday night.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270758
glfle 
expires:202608271415;;434139

open lake forecast for lake erie
national weather service cleveland oh
358 am edt thu aug 27 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 crosses the lake this morning, followed by a trailing
surface trough tonight. high pressure of 30.10 inches builds into
the great lakes friday before settling to the mid-atlantic region
sunday. a warm front moves north across lake erie sunday night 
ahead of low pressure approaching the western great lakes.


lez165>168-271415-
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-
358 am edt thu aug 27 2026

.today...west winds 5 to 15 knots. a slight chance of showers and
thunderstorms early. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming northeast. a slight
chance of showers. a chance of waterspouts from late evening on.
waves 2 feet or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...northeast winds 10 knots or less becoming east.
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 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots. a chance of showers
during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270758
glfle 
expires:202608271415;;434140

open lake forecast for lake erie
national weather service cleveland oh
358 am edt thu aug 27 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 crosses the lake this morning, followed by a trailing
surface trough tonight. high pressure of 30.10 inches builds into
the great lakes friday before settling to the mid-atlantic region
sunday. a warm front moves north across lake erie sunday night 
ahead of low pressure approaching the western great lakes.


lez061-169-271415-
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-
358 am edt thu aug 27 2026

.today...southwest winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers with a slight chance of
thunderstorms early, then a slight chance of showers late this
morning. waves 2 to 4 feet. 
.tonight...west winds 5 to 15 knots becoming north. a chance of
waterspouts. a slight chance of showers. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots. waves 1 foot or less. 
.friday night...north winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday...south winds 10 knots or less. waves 1 foot or less. 
.sunday...south winds 5 to 10 knots becoming southwest. a chance
of showers sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots. a chance of showers
during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 270758
glfle 
expires:202608271415;;434138

open lake forecast for lake erie
national weather service cleveland oh
358 am edt thu aug 27 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 crosses the lake this morning, followed by a trailing
surface trough tonight. high pressure of 30.10 inches builds into
the great lakes friday before settling to the mid-atlantic region
sunday. a warm front moves north across lake erie sunday night 
ahead of low pressure approaching the western great lakes.


lez162>164-271415-
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-
358 am edt thu aug 27 2026

.today...west winds 10 knots or less. waves 2 feet or less. 
.tonight...west winds 10 knots or less becoming northeast 10 to
15 knots. a chance of waterspouts after midnight. waves 2 feet or
less. 
.friday...northeast winds 5 to 15 knots becoming east. waves
2 feet or less. 
.friday night...east winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 5 to 10 knots. waves 1 foot or less. 
.sunday...southwest winds around 10 knots. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots. a chance of showers
during the day. waves 1 to 2 feet. 

$$

fzus63 kdtx 270744
glfsc 
expires:202608271600;;433905

lake st clair forecast
national weather service detroit/pontiac mi
344 am edt thu aug 27 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.


lcz460-271600-
lake st clair-
344 am edt thu aug 27 2026

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

$$

fzus63 kdtx 270744
glflh 
expires:202608271600;;433901

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 am edt thu aug 27 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.


lhz361-362-271600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
344 am edt thu aug 27 2026

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


$$

fzus63 kdtx 270744
glflh 
expires:202608271600;;433902

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 am edt thu aug 27 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.


lhz363-271600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
344 am edt thu aug 27 2026

.today...west winds 10 to 15 knots becoming northwest 5 to
10 knots in the afternoon. waves 1 to 3 feet. 
.tonight...north winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots. waves 2 feet or less. 
.friday night...light and variable winds. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.sunday...south winds 10 to 15 knots becoming southeast 5 to
10 knots by midnight. a chance of showers early in the morning.
rain showers likely and a chance of thunderstorms. waves 1 to 3 
feet. 
.monday...southeast winds 5 to 10 knots. a chance of showers and
thunderstorms early in the morning...then a chance of showers.
waves 2 feet or less. 


$$

fzus63 kdtx 270744
glflh 
expires:202608271600;;433903

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 am edt thu aug 27 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>464-271600-
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-
344 am edt thu aug 27 2026

.today...west winds 10 to 15 knots becoming northwest 5 to
10 knots in the afternoon. waves 1 to 3 feet. 
.tonight...north winds 5 to 10 knots increasing to 10 to 15 knots
by midnight...then decreasing to 5 to 10 knots early in the
morning. waves 1 to 3 feet. 
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...north winds 5 to 10 knots veering to the east by
midnight...then veering to the south after midnight. waves 2 feet
or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots late in the evening. waves 2 feet or less. 
.sunday...south winds 10 to 15 knots decreasing to 5 to 10 knots
by midnight. a chance of showers. a chance of thunderstorms. rain
showers likely by midnight. waves 1 to 3 feet. 
.monday...south winds 5 to 10 knots. showers likely and a chance
of thunderstorms early in the morning...then a chance of showers.
waves 2 feet or less. 


$$

fzus63 kmkx 270746
glflm 
expires:202608271530;;433970

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
246 am cdt thu aug 27 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 northerly winds will continue today as the low pressure
trough of 29.9 inches exits michigan and the upper great lakes.  
winds then become light and variable tonight 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. breezy 
southerly winds will develop for the weekend, but gusts are
expected to remain below gale force.


lmz080-669-671-673-675-777-779-870-872-874-876-878-271530-
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-
246 am cdt thu aug 27 2026

sheboygan wi to pentwater mi south...

.today...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.tonight...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 to 30 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 15 to 25 kt. chance of showers.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft. 
.monday...south winds 15 to 25 kt. chance of showers. waves 3 to
5 ft.  

$$

fzus63 kmkx 270746
glflm 
expires:202608271530;;433969

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
246 am cdt thu aug 27 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 northerly winds will continue today as the low pressure
trough of 29.9 inches exits michigan and the upper great lakes.  
winds then become light and variable tonight 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. breezy 
southerly winds will develop for the weekend, but gusts are
expected to remain below gale force.


lmz261-362-364-366-563-565-567-868-271530-
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-
246 am cdt thu aug 27 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 10 to 20 kt becoming north 15 to 25 kt.
waves 2 to 4 ft. 
.tonight...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 5 to 10 kt veering to southeast 10 to
15 kt. waves 1 to 2 ft. 
.friday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft. 
.saturday...southwest winds 15 to 25 kt increasing to 30 kt.
chance of showers in the morning. waves 2 to 4 ft building to
3 to 5 ft. 
.saturday night...south winds to 30 kt diminishing to 15 to
25 kt. chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds to 30 kt. showers likely with a chance of
thunderstorms. waves 4 to 7 ft occasionally to 9 ft. 
.monday...south winds 15 to 25 kt. chance of showers. waves 3 to
5 ft.  

$$

fzus63 kmqt 270801
glfls 
expires:202608272000;;434349

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz264-272000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt thu aug 27 2026

.early this morning...north winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.today...north winds 5 to 15 knots backing northwest late. a
slight chance of showers by mid afternoon. waves subsiding to
calm to 2 feet. 
.tonight...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 southwest 5 to
15 knots in the afternoon, then backing south late. 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 backing east
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of showers. waves building to 1 to 3 feet. 
.monday...east 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. 

$$

fzus63 kmqt 270801
glfls 
expires:202608272000;;434350

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz265-272000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt thu aug 27 2026

.early this morning...north winds 15 to 25 knots. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet. 
.today...north winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southeast in the
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...southeast winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots. a chance of showers. waves
building to 1 to 3 feet. 
.monday...east 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 270801
glfls 
expires:202608272000;;434347

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu aug 27 2026 /300 am cdt thu aug 27 2026/

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing southwest in the
afternoon, then backing southeast late. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing north late. waves
calm to 2 feet. 
.friday...northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots becoming northeast less
than 10 knots 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 becoming northeast
5 to 15 knots after midnight. a chance of showers. waves calm to
2 feet. 
.sunday...northeast winds 15 to 25 knots. a chance of showers.
waves building to 1 to 3 feet. 
.monday...northeast winds 15 to 25 knots becoming north 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$

fzus63 kmqt 270801
glfls 
expires:202608272000;;434352

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz267-272000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt thu aug 27 2026

.early this morning...northwest winds 15 to 25 knots. patchy
dense fog. waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet. 
.today...north winds 15 to 25 knots backing northwest late. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots veering north after
midnight, then diminishing to 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing west in the
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 backing southeast by mid
afternoon. 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 10 to 20 knots veering south. a chance
of showers. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202608272000;;434351

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz266-272000-
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-
400 am edt thu aug 27 2026

.early this morning...north winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...north winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing northwest late. waves subsiding to
1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing east late. 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 backing southeast by mid
afternoon. 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. a chance of showers. waves
building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots veering southwest. a
chance of showers. waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202608272000;;434348

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu aug 27 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 over northern manitoba stretches towards 
lake superior today through tonight, eventually becoming centered 
over lake superior at 30.2 inches 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 over the course of early next 
week, with heights over lake superior falling to 29.8 inches by 
monday afternoon.




lsz263-272000-
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-
400 am edt thu aug 27 2026

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

$$