fzus61 kbuf 090803
glflo 
expires:202608091500;;871117

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun aug 9 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 30.2 inch high will ridge northward across the lower 
great lakes today. this ridge will then begin to exit eastward, with 
a warm front crossing the lake later tonight, followed by a cold 
front moving across the lake monday night. behind the front, a 
trough averaging 29.8 inches will linger over the eastern great 
lakes through this thursday, with another cold front progged to 
sweep across the lake wednesday night.


loz062-091500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sun aug 9 2026

.today...west winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.tonight...south winds 10 knots or less. a chance of showers
after midnight. showers likely late. waves 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming west. showers
likely in the morning, then showers likely with a chance of
thunderstorms in the afternoon. waves 2 feet or less. 
.monday night...west winds 5 to 10 knots. a chance of showers in
the evening. waves 1 to 2 feet. 
.tuesday...west winds 10 knots or less becoming north. waves
1 foot or less. 
.wednesday...northwest winds 10 knots or less. a chance of
showers. waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots. a chance of showers
during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 090803
glflo 
expires:202608091500;;871118

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun aug 9 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 30.2 inch high will ridge northward across the lower 
great lakes today. this ridge will then begin to exit eastward, with 
a warm front crossing the lake later tonight, followed by a cold 
front moving across the lake monday night. behind the front, a 
trough averaging 29.8 inches will linger over the eastern great 
lakes through this thursday, with another cold front progged to 
sweep across the lake wednesday night.


loz063>065-091500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun aug 9 2026

.today...west winds 10 to 15 knots. waves 1 to 3 feet. 
.tonight...west winds 5 to 15 knots becoming south. a chance of
showers late. waves 2 feet or less. 
.monday...south winds 10 to 15 knots becoming west. showers
likely in the morning, then showers likely with a chance of
thunderstorms in the afternoon. waves 1 to 2 feet. 
.monday night...west winds 10 to 15 knots. a chance of showers
and thunderstorms in the evening. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...west winds 10 knots or less. a chance of showers.
waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 091348
glfle 
expires:202608092015;;883242

open lake forecast for lake erie
national weather service cleveland oh
948 am edt sun aug 9 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 ridge averaging 30.00 inches builds over the area today. three 
weak low pressure systems 29.90 inches will move through the 
region sunday night through wednesday. high pressure 30.00 inches
will build into the region starting on thursday.


lez162>164-092015-
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-
948 am edt sun aug 9 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 091348
glfle 
expires:202608092015;;883244

open lake forecast for lake erie
national weather service cleveland oh
948 am edt sun aug 9 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 ridge averaging 30.00 inches builds over the area today. three 
weak low pressure systems 29.90 inches will move through the 
region sunday night through wednesday. high pressure 30.00 inches
will build into the region starting on thursday.


lez061-168-169-092015-
ripley to buffalo ny extending from 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-
948 am edt sun aug 9 2026

.this afternoon...northeast winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.tonight...light and variable winds becoming southwest 15 to
20 knots. a slight chance of showers and thunderstorms late in
the evening. a chance of showers and thunderstorms after
midnight. waves 1 foot or less building to 1 to 3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning. waves 2 to 4 feet building to 3 to 5 feet. 
.monday night...west winds 5 to 15 knots becoming southwest. a
chance of showers. waves 2 to 4 feet subsiding to 1 to 2 feet. 
.tuesday...southwest winds 10 knots or less becoming west. a
chance of showers. waves 1 to 2 feet. 
.wednesday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots becoming north. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 091348
glfle 
expires:202608092015;;883243

open lake forecast for lake erie
national weather service cleveland oh
948 am edt sun aug 9 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 ridge averaging 30.00 inches builds over the area today. three 
weak low pressure systems 29.90 inches will move through the 
region sunday night through wednesday. high pressure 30.00 inches
will build into the region starting on thursday.


lez165>167-092015-
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-
948 am edt sun aug 9 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 091340 aaa
glflh 
expires:202608092145;;883139

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
940 am edt sun aug 9 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...high pressure around 30.00 inches slides east through
the ohio valley today, allowing winds to become southerly once
again. this evening through early next week an active pattern
with a stalled frontal boundary draped over the southern great
lakes region brings back chances for organized thunderstorms to
the region. by the end of next week, high pressure around 30.1
inches builds south from central canada.


lhz462>464-092145-
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-
940 am edt sun aug 9 2026

.rest of today...south winds 5 to 10 knots. waves 2 feet or less.
.tonight...south winds 5 to 10 knots increasing to 10 to 15 knots
by midnight...then veering to the west early in the morning. a
chance of showers after midnight. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots veering to the northwest early
in the afternoon. a chance of showers in the morning. waves
2 feet or less. 
.monday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.tuesday...light and variable winds in the morning becoming east
5 to 10 knots...then backing to the northeast late in the
afternoon becoming light and variable. a chance of showers. waves
2 feet or less. 
.wednesday...north winds 5 to 10 knots backing to the west in the
late morning and early afternoon...then veering to the north .
waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots early in the evening...then becoming northwest 5 to
10 knots by midnight. waves 1 to 3 feet building to 2 to 4 feet
by midnight. 


$$

fzus63 kdtx 091340 aaa
glflh 
expires:202608092145;;883138

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
940 am edt sun aug 9 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...high pressure around 30.00 inches slides east through
the ohio valley today, allowing winds to become southerly once
again. this evening through early next week an active pattern
with a stalled frontal boundary draped over the southern great
lakes region brings back chances for organized thunderstorms to
the region. by the end of next week, high pressure around 30.1
inches builds south from central canada.


lhz362-363-092145-
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-
940 am edt sun aug 9 2026

.rest of today...south winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet late in the afternoon. 
.tonight...southeast winds 5 to 10 knots. a chance of showers.
waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening
and overnight. 
.monday...northwest winds 5 to 10 knots. a chance of showers in
the morning. waves 2 feet or less. 
.monday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 1 to 3 feet. 
.tuesday...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds becoming north 5 to
10 knots early in the evening...then backing to the northwest by
midnight. waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots. waves 1 to 3 feet
building to 4 to 6 feet . waves occasionally around 8 feet. 


$$

fzus63 kdtx 091340 aaa
glflh 
expires:202608092145;;883137

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
940 am edt sun aug 9 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...high pressure around 30.00 inches slides east through
the ohio valley today, allowing winds to become southerly once
again. this evening through early next week an active pattern
with a stalled frontal boundary draped over the southern great
lakes region brings back chances for organized thunderstorms to
the region. by the end of next week, high pressure around 30.1
inches builds south from central canada.


lhz361-092145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
940 am edt sun aug 9 2026

.rest of today...southwest winds 5 to 10 knots veering to the
north late in the afternoon. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots early in the evening becoming
light and variable. a chance of showers after midnight. waves
2 feet or less. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.monday night...west winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds becoming northwest 5 to
10 knots . waves 2 feet or less. 
.thursday...northwest winds 10 to 15 knots becoming west 15 to
20 knots early in the evening...then becoming northwest 10 to
15 knots by midnight. waves 1 to 3 feet building to 3 to 5 feet .


$$

fzus63 kdtx 091340
glfsc 
expires:202608092145;;883143

lake st clair forecast
national weather service detroit/pontiac mi
940 am edt sun aug 9 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...high pressure around 30.00 inches slides east through
the ohio valley today, allowing winds to become southerly once
again. this evening through early next week an active pattern
with a stalled frontal boundary draped over the southern great
lakes region brings back chances for organized thunderstorms to
the region. by the end of next week, high pressure around 30.1
inches builds south from central canada.


lcz460-092145-
lake st clair-
940 am edt sun aug 9 2026

.rest of today...light and variable winds becoming south 10 to 15
knots. mostly sunny. waves 2 feet or less.
.tonight...southwest winds 10 to 15 knots. partly cloudy early in
the evening. a chance of showers late in the evening. showers and a
chance of thunderstorms after midnight. waves 2 feet or less.
.monday...west winds 10 to 15 knots diminishing to 5 to 10 knots
early in the afternoon. mostly cloudy until late afternoon then
clearing. a chance of showers early in the morning. waves 2 feet or
less.
.monday night...west winds 5 to 10 knots backing to the south after
midnight. partly cloudy. a chance of light showers after midnight.
waves 2 feet or less.
.tuesday...southwest winds 5 to 10 knots backing to the northeast in
the 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.
.wednesday...northwest winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.
.thursday...northeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kmkx 090852
glflm 
expires:202608091515;;873218

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
352 am cdt sun aug 9 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...

southerly winds will persist this morning as a low pressure 
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first 
round of weakening storms should arrive in southern lake michigan 
late sunday morning, and additional storms are possible there 
sunday night.

winds today will be southerly and breezy, then grow light and
variable for a time tonight ahead of a cold front. the front will
move southward down the lake into monday, leading to light
northerly winds through the morning on monday and light and
variable winds monday afternoon and evening. light and variable
winds then persist into tuesday as high pressure of 30.0 inches
remains in place north of a frontal boundary parked over the corn
belt.


lmz261-362-364-366-563-565-567-868-091515-
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-
352 am cdt sun aug 9 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 10 to 20 kt becoming south. slight
chance of showers this morning, then chance of showers this
afternoon. waves 2 to 4 ft. 
.tonight...southwest 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 northwest late. slight chance of showers and
thunderstorms in the evening. patchy fog overnight. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.monday...north winds 5 to 10 kt backing to south 10 to 15 kt.
waves 1 to 2 ft. 
.monday night...southeast winds 10 to 15 kt becoming northeast.
waves 1 ft or less. 
.tuesday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
chance of showers. waves 1 ft or less. 
.tuesday night...north winds 5 to 10 kt. waves 1 ft or less.
.wednesday...northwest winds 5 to 10 kt becoming north 10 to
20 kt. waves 1 ft or less. 
.thursday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 090852
glflm 
expires:202608091515;;873219

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
352 am cdt sun aug 9 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...

southerly winds will persist this morning as a low pressure 
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first 
round of weakening storms should arrive in southern lake michigan 
late sunday morning, and additional storms are possible there 
sunday night.

winds today will be southerly and breezy, then grow light and
variable for a time tonight ahead of a cold front. the front will
move southward down the lake into monday, leading to light
northerly winds through the morning on monday and light and
variable winds monday afternoon and evening. light and variable
winds then persist into tuesday as high pressure of 30.0 inches
remains in place north of a frontal boundary parked over the corn
belt.


lmz080-669-671-673-675-777-779-870-872-874-876-878-091515-
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-
352 am cdt sun aug 9 2026

sheboygan wi to pentwater mi south...

.today...south winds 10 to 20 kt. chance of showers and
thunderstorms this afternoon. waves 2 to 4 ft. 
.tonight...south winds 10 to 20 kt becoming west. chance of
showers and thunderstorms in the evening, then chance of showers
and slight chance of thunderstorms overnight. patchy fog
overnight. waves 2 to 4 ft. 
.monday...northwest winds 10 to 15 kt veering to northeast 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.monday night...northeast winds 5 to 10 kt. showers likely with a
chance of thunderstorms in the evening, then showers likely
overnight. waves 1 ft or less. 
.tuesday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
chance of showers. waves 1 ft or less. 
.tuesday night...northeast winds 5 to 10 kt. chance of showers
and thunderstorms. waves 1 ft or less. 
.wednesday...north winds 5 to 10 kt becoming northwest 10 to
15 kt. waves 1 ft or less. 
.thursday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870982

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun aug 9 2026 /300 am cdt sun aug 9 2026/

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

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870987

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz267-092000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt sun aug 9 2026

.early this morning...southwest winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.today...west winds 10 to 20 knots becoming south 5 to 15 knots
in the afternoon, then backing northeast late. a chance of
showers. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight. a slight chance of showers through midnight. patchy fog
through midnight, then areas of dense fog after midnight. waves
calm to 2 feet. 
.monday...northwest winds 5 to 15 knots backing west in the
afternoon, then veering northwest late. areas of dense fog
through early afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870986

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz266-092000-
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 sun aug 9 2026

.early this morning...southwest winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.today...southwest winds 10 to 20 knots becoming south 5 to
15 knots in the afternoon, then backing northeast late. a chance
of showers. a slight chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing north after midnight,
then backing southwest late. a slight chance of showers through
midnight. patchy fog through midnight, then areas of dense fog
after midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots. areas of dense fog
through early afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...west winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870985

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz265-092000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt sun aug 9 2026

.early this morning...west winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots backing east in the
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest late.
patchy fog through midnight, then areas of dense fog after
midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots. patchy dense fog through
early afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...northwest winds 10 to 20 knots backing west. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870984

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz264-092000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt sun aug 9 2026

.early this morning...west winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.today...southwest winds 5 to 15 knots. a chance of showers
through early afternoon. patchy fog. waves calm to 2 feet. 
.tonight...southwest winds less than 10 knots. patchy fog through
midnight, then areas of dense fog after midnight. waves calm to
2 feet. 
.monday...southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon. areas of dense fog through early
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds less than 10 knots veering west
after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202608092000;;870983

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun aug 9 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...

upper michigan is situated between a 29.6 inch hudson bay low and a 
30.0 inch high centered over the ohio river valley. this will drive 
weak and ill-defined 29.9 inch ridging/troughing over lake superior 
today through monday night as the high moves southeast. weak ridging 
of 30.0 inches extending between a 30.2 inch bermuda high and 30.0 
inch ridging over western canada returns for tuesday before 
decreasing to 29.9 inches tuesday night. a 29.8 inch trough moves 
over the lake wednesday before ridging of 30.0 inches returns on 
thursday from the canadian prairie.




lsz263-092000-
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 sun aug 9 2026

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

$$