fzus61 kbuf 050803
glflo 
expires:202608051500;;649453

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt wed aug 5 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 high pressure ridge averaging 30.0 inches will drift 
away from the region. a trough and cold front will then ever so 
slowly approach lake ontario from the northwest through this weekend.


loz063>065-051500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt wed aug 5 2026

.today...south winds 10 knots or less becoming east. waves 2 feet
or less. 
.tonight...southeast winds 10 knots or less becoming south. waves
1 foot or less. 
.thursday...south winds 10 knots or less becoming west. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.thursday night...south winds less than 10 knots becoming west.
waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south.
showers likely with a chance of thunderstorms. waves 1 foot or
less. 
.saturday...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 saturday night. waves 1 foot
or less. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 050803
glflo 
expires:202608051500;;649452

open lake forecast for lake ontario
national weather service buffalo ny
403 am edt wed aug 5 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 high pressure ridge averaging 30.0 inches will drift 
away from the region. a trough and cold front will then ever so 
slowly approach lake ontario from the northwest through this weekend.


loz062-051500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt wed aug 5 2026

.today...light and variable winds. waves 1 foot or less. 
.tonight...east winds 10 knots or less becoming southwest. waves
1 foot or less. 
.thursday...southwest winds less than 10 knots. waves 1 foot or
less. 
.thursday night...south winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.friday...light and variable winds becoming southwest 5 to
10 knots. showers likely with a chance of thunderstorms. waves
1 foot or less. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers. waves 1 foot or less. 
.sunday...west winds 5 to 15 knots becoming southwest. showers
likely sunday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 050759
glfle 
expires:202608051415;;649168

open lake forecast for lake erie
national weather service cleveland oh
359 am edt wed aug 5 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...
high pressure of 30.00 inches over lake erie will weaken today 
as it drifts east ahead of an approaching cold front. this front
with pressure of 29.90 inches will slow just to the west of lake 
erie thursday before stalling on friday. a secondary trough will
finally push the front across the lake on saturday. a ridge of
30.00 inches will build into the southern great lakes on sunday.


lez162>164-051415-
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-
359 am edt wed aug 5 2026

.today...south winds less than 10 knots becoming east. waves
1 foot or less. 
.tonight...southeast winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms in the afternoon. waves 1 foot or less. 
.thursday night...west winds 10 knots or less becoming southwest.
a chance of showers and thunderstorms in the evening, then
showers likely overnight. waves 1 foot or less. 
.friday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms during the day, then a chance of showers friday
night. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.sunday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms sunday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 050759
glfle 
expires:202608051415;;649169

open lake forecast for lake erie
national weather service cleveland oh
359 am edt wed aug 5 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...
high pressure of 30.00 inches over lake erie will weaken today 
as it drifts east ahead of an approaching cold front. this front
with pressure of 29.90 inches will slow just to the west of lake 
erie thursday before stalling on friday. a secondary trough will
finally push the front across the lake on saturday. a ridge of
30.00 inches will build into the southern great lakes on sunday.


lez061-165>169-051415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
359 am edt wed aug 5 2026

.today...southeast winds 10 knots or less becoming northeast. a
chance of showers and thunderstorms late. waves 1 foot or less. 
.tonight...southeast winds 10 knots or less becoming southwest. a
chance of showers with a slight chance of thunderstorms early,
then a slight chance of showers late in the evening. waves 1 foot
or less. 
.thursday...southwest winds 5 to 10 knots becoming west. waves
1 foot or less. 
.thursday night...west winds less than 10 knots becoming south. a
chance of showers overnight. waves 1 foot or less. 
.friday...southwest winds 5 to 15 knots. showers likely with a
chance of thunderstorms. waves 2 feet or less. 
.saturday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. showers likely with a
chance of thunderstorms sunday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 050741
glfsc 
expires:202608051600;;648848

lake st clair forecast
national weather service detroit/pontiac mi
341 am edt wed aug 5 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...a slow moving cold front will move into lake huron
today triggering showers and a chance for thunderstorms. the
boundary then stalls briefly before drifting toward the eastern
great lakes by the end of the workweek with periodic
shower/thunderstorm chances.


lcz460-051600-
lake st clair-
341 am edt wed aug 5 2026

.today...light and variable winds becoming south 10 to 15 knots.
sunny. waves 2 feet or less.
.tonight...south winds 10 to 15 knots becoming southwest 5 to 10
knots by midnight...then veering to the west early in the morning.
partly cloudy. waves 2 feet or less.
.thursday...west winds 5 to 10 knots backing to the southwest in the
late morning and afternoon. partly sunny. a chance of light showers
until late afternoon...then a chance of showers and thunderstorms
early in the afternoon. waves 2 feet or less.
.thursday night...southeast winds 5 to 10 knots becoming light and
variable. mostly cloudy with a chance of showers and thunderstorms
early in the evening...then partly cloudy with a chance of light
showers in the late evening and overnight. waves 2 feet or less.
.friday...light and variable winds becoming south 5 to 10 knots in
the afternoon and evening. partly sunny with a chance of light
showers in the morning...then partly cloudy with a chance of showers
and thunderstorms in the afternoon and evening. waves 2 feet or
less.
.saturday...west winds 5 to 10 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.
.sunday...southwest winds 10 to 15 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 050741
glflh 
expires:202608051600;;648826

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt wed aug 5 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...a slow moving cold front will move into lake huron
today triggering showers and a chance for thunderstorms. the
boundary then stalls briefly before drifting toward the eastern
great lakes by the end of the workweek with periodic
shower/thunderstorm chances.


lhz361-051600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
341 am edt wed aug 5 2026

.today...light and variable winds becoming east 5 to 10 knots
late in the morning...then becoming light and variable in the
afternoon. a chance of showers in the morning...then a chance of
showers and thunderstorms in the afternoon. waves 2 feet or less.
.tonight...light and variable winds. a chance of showers in the
evening. waves 2 feet or less. 
.thursday...light and variable winds. waves 2 feet or less. 
.thursday night...light and variable winds becoming south 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.friday...south winds 5 to 10 knots backing to the southeast.
waves 2 feet or less. 
.saturday...west winds 5 to 10 knots increasing to 10 to 15 knots
early in the evening...then becoming light and variable by
midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots veering to the northwest
by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 050741
glflh 
expires:202608051600;;648827

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt wed aug 5 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...a slow moving cold front will move into lake huron
today triggering showers and a chance for thunderstorms. the
boundary then stalls briefly before drifting toward the eastern
great lakes by the end of the workweek with periodic
shower/thunderstorm chances.


lhz362-363-051600-
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-
341 am edt wed aug 5 2026

.today...light and variable winds becoming south 5 to 10 knots in
the late morning and early afternoon...then backing to the
southeast late in the afternoon. a chance of showers. waves 2 to
4 feet subsiding to 1 to 3 feet in the late morning and
afternoon. 
.tonight...southeast winds 5 to 10 knots backing to the east late
in the evening...then backing to the east 5 to 10 knots after
midnight backing to the west early in the morning. a chance of
showers. waves 2 feet or less. 
.thursday...light and variable winds. a chance of showers in the
morning. waves 2 feet or less. 
.thursday night...light and variable winds. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to
10 knots. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming light and
variable. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
until early evening. waves 2 feet or less. 


$$

fzus63 kdtx 050741
glflh 
expires:202608051600;;648828

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 am edt wed aug 5 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...a slow moving cold front will move into lake huron
today triggering showers and a chance for thunderstorms. the
boundary then stalls briefly before drifting toward the eastern
great lakes by the end of the workweek with periodic
shower/thunderstorm chances.


lhz462>464-051600-
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-
341 am edt wed aug 5 2026

.today...south winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 1 to 3 feet. 
.tonight...south winds 5 to 10 knots veering to the west early in
the morning. a chance of showers after midnight. waves 2 feet or
less. 
.thursday...north winds 5 to 10 knots. a chance of showers. waves
2 feet or less. 
.thursday night...northeast winds 5 to 10 knots early in the
evening becoming light and variable. a chance of showers in the
evening. waves 2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots
late in the evening. a chance of showers late in the afternoon.
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.sunday...west winds 5 to 10 knots backing to the southwest. a
chance of showers and thunderstorms...then a chance of showers by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 050810
glflm 
expires:202608051530;;650183

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
310 am cdt wed aug 5 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...

a decaying cold front is slowly moving south across southern lake
michigan early this morning. light and variable winds can be 
expected today into thursday as the front shifts south and
weakens,and high pressure moves into the region. intermittent 
showers and thunderstorms can also be expected today into tonight.

a prolonged period of south-southwest winds will then become 
established across lake michigan late thursday night through 
sunday, with the exception of northwest winds saturday morning 
with a brief cold frontal passage.


lmz080-669-671-673-675-777-779-870-872-874-876-878-051530-
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-
310 am cdt wed aug 5 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 15 kt becoming south. scattered
showers and slight chance of thunderstorms. waves 1 to 2 ft. 
.tonight...southwest winds 10 to 15 kt veering to north.
scattered showers with a chance of thunderstorms in the evening,
then slight chance of thunderstorms with isolated showers
overnight. patchy fog overnight. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt becoming north. waves 1 ft
or less. 
.thursday night...east winds 5 to 10 kt veering to south. waves
nearly calm. 
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 ft or less building to 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.saturday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south. chance of
showers. waves 1 to 3 ft.  

$$

fzus63 kmkx 050810
glflm 
expires:202608051530;;650182

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
310 am cdt wed aug 5 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...

a decaying cold front is slowly moving south across southern lake
michigan early this morning. light and variable winds can be 
expected today into thursday as the front shifts south and
weakens,and high pressure moves into the region. intermittent 
showers and thunderstorms can also be expected today into tonight.

a prolonged period of south-southwest winds will then become 
established across lake michigan late thursday night through 
sunday, with the exception of northwest winds saturday morning 
with a brief cold frontal passage.


lmz261-362-364-366-563-565-567-868-051530-
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-
310 am cdt wed aug 5 2026

sheboygan wi to pentwater mi north...

.today...north winds 5 to 10 kt veering to southeast. patchy fog
this morning. scattered showers and slight chance of
thunderstorms this morning, then slight chance of thunderstorms
with isolated showers this afternoon. waves 1 to 3 ft subsiding
to 1 to 2 ft. 
.tonight...east winds 5 to 10 kt becoming south. patchy fog
overnight. waves 1 ft or less. 
.thursday...south winds 5 to 10 kt becoming southwest late in the
morning, then becoming 10 to 20 kt early in the afternoon
becoming southwest 10 to 20 kt late. waves 1 to 2 ft. 
.thursday night...south winds 10 to 15 kt. waves 1 to 2 ft. 
.friday...south winds 10 to 20 kt. waves 1 to 3 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649320

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz162-052000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt wed aug 5 2026 /301 am cdt wed aug 5 2026/

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

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649321

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz263-052000-
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-
401 am edt wed aug 5 2026

.early this morning...west winds less than 10 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon, then backing south late. waves
building to 1 to 3 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then veering southwest late. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.thursday...southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.thursday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...southwest winds 15 to 25 knots. showers likely by mid
afternoon. waves subsiding to 1 to 3 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.sunday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649322

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz264-052000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt wed aug 5 2026

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing south late. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then backing south late. waves
building to 2 to 4 feet. 
.thursday night...south winds 15 to 25 knots veering southwest
after midnight. waves subsiding to 1 to 3 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. showers likely by mid afternoon. waves
subsiding to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649323

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz265-052000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt wed aug 5 2026

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing east in the afternoon.
waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering southwest late.
waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots backing south in the
afternoon. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday...south winds 10 to 20 knots. showers likely by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots. showers likely through
midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest. waves
calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots backing west. waves calm
to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649324

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz266-052000-
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-
401 am edt wed aug 5 2026

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing east late. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots. waves building to 1 to
3 feet. 
.thursday night...south winds 20 to 30 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.friday...south winds 10 to 20 knots. a chance of showers by mid
afternoon. waves subsiding to 1 to 3 feet. 
.friday night...southwest winds 10 to 20 knots veering west after
midnight. showers likely through midnight. waves subsiding to
calm to 2 feet. 
.saturday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 050801
glfls 
expires:202608052000;;649325

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this morning, which lingers through thursday. for the late 
week and into the weekend, pressure over lake superior will remain 
around 29.9 to 30.0 inches between a 30.3 inch bermuda high and 29.5 
inch low pressure near the western shores of hudson bay.




lsz267-052000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt wed aug 5 2026

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...southwest winds 5 to 15 knots veering northwest late.
waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.friday night...south winds 10 to 20 knots becoming west 5 to
15 knots after midnight. showers through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$