fzus61 kbuf 130202
glflo 
expires:202608130900;;089341

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed aug 12 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 trough averaging 29.7 inches will move across the lakes this 
evening where it will linger through thursday. a cold front then 
sweeps across the lake thursday night, with a 30.2 inch high 
pressure ridge building in from the upper great lakes on friday, 
settling over the lower great lakes region on saturday. a low 
averaging 29.7 inches is expected to approach the lake sunday. the 
low will move northwest of the lake monday.


loz063>065-130900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed aug 12 2026

.overnight...southwest winds 10 knots or less becoming
west. a chance of showers and thunderstorms. waves 1 foot or
less. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
1 foot or less. 
.thursday night...west winds 10 knots or less becoming north.
waves 1 foot or less. 
.friday...north winds 10 knots or less. waves 1 foot or less. 
.friday night...north winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.saturday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.sunday...southeast winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.monday...north winds 5 to 10 knots becoming west. waves 1 foot
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 130202
glflo 
expires:202608130900;;089340

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed aug 12 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 trough averaging 29.7 inches will move across the lakes this 
evening where it will linger through thursday. a cold front then 
sweeps across the lake thursday night, with a 30.2 inch high 
pressure ridge building in from the upper great lakes on friday, 
settling over the lower great lakes region on saturday. a low 
averaging 29.7 inches is expected to approach the lake sunday. the 
low will move northwest of the lake monday.


loz062-130900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt wed aug 12 2026

.overnight...southwest winds 10 knots or less becoming
northwest. waves 1 foot or less. 
.thursday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday night...west winds 10 knots or less becoming north.
waves 1 foot or less. 
.friday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.friday night...northeast winds 10 knots or less. waves 1 foot or
less. 
.saturday...east winds 5 to 10 knots becoming southeast. waves
1 foot or less. 
.sunday...southeast winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.monday...northwest winds 5 to 10 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 130141
glfle 
expires:202608130815;;088900

open lake forecast for lake erie
national weather service cleveland oh
941 pm edt wed aug 12 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 frontal boundary will waver across the ohio valley through
thursday evening with pressure of 29.90 inches. high pressure 
30.20 inches builds into the great lakes region friday and will 
drift southeast through saturday evening. a warm front lifts north
across the lake sunday morning followed by a cold front and low 
pressure 29.90 inches sunday night.


lez162>164-130815-
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-
941 pm edt wed aug 12 2026

.rest of tonight...west winds 5 to 10 knots becoming northwest. a
slight chance of showers and thunderstorms late this evening.
waves 1 foot or less. 
.thursday...north winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.thursday night...southeast winds 10 knots or less becoming east.
waves 2 feet or less. 
.friday...east winds 5 to 10 knots. waves 1 to 2 feet. 
.friday night...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming south. a chance of
showers. waves 2 feet or less. 
.sunday...southwest winds around 10 knots becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers sunday night. waves 1 to 2 feet. 
.monday...north winds 5 to 10 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 130141
glfle 
expires:202608130815;;088902

open lake forecast for lake erie
national weather service cleveland oh
941 pm edt wed aug 12 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 frontal boundary will waver across the ohio valley through
thursday evening with pressure of 29.90 inches. high pressure 
30.20 inches builds into the great lakes region friday and will 
drift southeast through saturday evening. a warm front lifts north
across the lake sunday morning followed by a cold front and low 
pressure 29.90 inches sunday night.


lez061-168-169-130815-
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-
941 pm edt wed aug 12 2026

.rest of tonight...southwest winds 5 to 10 knots becoming
northwest. a chance of showers with a slight chance of
thunderstorms, then a slight chance of showers late. waves 1 foot
or less. 
.thursday...north winds 10 knots or less becoming west. a slight
chance of showers early. waves 1 foot or less. 
.thursday night...west winds 10 knots or less becoming northeast.
waves 2 feet or less. 
.friday...northeast winds 10 knots or less. waves 2 feet or less.
.friday night...northeast winds 5 to 10 knots becoming east.
waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers saturday night. waves 2 feet or less. 
.sunday...southwest winds 5 to 15 knots becoming northwest.
showers likely with a chance of thunderstorms during the day,
then a chance of showers sunday night. waves 1 to 3 feet. 
.monday...north winds 5 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 130141
glfle 
expires:202608130815;;088901

open lake forecast for lake erie
national weather service cleveland oh
941 pm edt wed aug 12 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 frontal boundary will waver across the ohio valley through
thursday evening with pressure of 29.90 inches. high pressure 
30.20 inches builds into the great lakes region friday and will 
drift southeast through saturday evening. a warm front lifts north
across the lake sunday morning followed by a cold front and low 
pressure 29.90 inches sunday night.


lez165>167-130815-
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-
941 pm edt wed aug 12 2026

.rest of tonight...west winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms. a slight chance of showers 
late. waves 1 foot or less. 
.thursday...north winds 10 knots or less becoming northwest. a
slight chance of showers early. waves 1 foot or less. 
.thursday night...northwest winds 10 knots or less becoming
northeast. waves 2 feet or less. 
.friday...east winds 5 to 10 knots becoming northeast. waves 1 to
3 feet. 
.friday night...northeast winds 5 to 10 knots becoming east.
waves 1 to 2 feet. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers saturday night. waves 1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots becoming north. showers
likely with a chance of thunderstorms. waves 1 to 3 feet. 
.monday...north winds 5 to 15 knots. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 130201
glflh 
expires:202608131015;;089297

open lake forecast for lake huron
national weather service detroit/pontiac mi
1001 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz362-363-131015-
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-
1001 pm edt wed aug 12 2026

.rest of tonight...light and variable winds becoming northwest
5 to 10 knots after midnight. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 feet or less. 
.thursday night...light and variable winds. waves 2 feet or less.
.friday...light and variable winds becoming north 5 to 10 knots
in the late morning and afternoon. waves 2 feet or less. 
.friday night...northeast winds 5 to 10 knots early in the
evening becoming light and variable...then becoming east 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...southeast winds 5 to 10 knots. a chance of showers
late in the evening. waves 2 feet or less. 
.sunday...south winds 5 to 10 knots veering to the west early in
the evening...then becoming northwest 10 to 15 knots by midnight.
a chance of showers early in the morning. waves 1 to 3 feet. 
.monday...northwest winds 10 to 15 knots becoming north 5 to
10 knots until early evening...then veering to the east by
midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 130201
glflh 
expires:202608131015;;089298

open lake forecast for lake huron
national weather service detroit/pontiac mi
1001 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz462>464-131015-
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-
1001 pm edt wed aug 12 2026

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


$$

fzus63 kdtx 130201
glfsc 
expires:202608131015;;089307

lake st clair forecast
national weather service detroit/pontiac mi
1001 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lcz460-131015-
lake st clair-
1001 pm edt wed aug 12 2026

.tonight...southwest winds 5 to 10 knots veering to the northwest
after midnight. partly cloudy. a chance of showers and thunderstorms
in the evening. waves 2 feet or less.
.thursday...north winds 5 to 10 knots early in the morning becoming
light and variable. partly sunny. waves 2 feet or less.
.thursday night...east winds 5 to 10 knots. mostly cloudy early in
the evening becoming partly cloudy. waves 2 feet or less.
.friday...east winds 5 to 10 knots. partly sunny. waves 2 feet or
less.
.friday night...northeast winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. mostly clear. waves 2 feet or less.
.saturday...southeast winds 5 to 10 knots increasing to 10 to 15
knots in the evening. mostly sunny becoming partly cloudy. waves 2
feet or less.
.sunday...north winds 10 to 15 knots. partly cloudy. showers likely
and a chance of thunderstorms. waves 2 feet or less.
.monday...northeast winds 10 to 15 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 130201
glflh 
expires:202608131015;;089296

open lake forecast for lake huron
national weather service detroit/pontiac mi
1001 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz361-131015-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
1001 pm edt wed aug 12 2026

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


$$

fzus63 kmkx 130200
glflm 
expires:202608130915;;089211

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cdt wed aug 12 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 stalled frontal boundary just to the south of lake michigan will 
remain into mid day thursday before retreating south toward the ohio 
river valley. periodic rain, storms and areas of fog will be 
possible across the southern half of the lake until this front 
moves south. light and variable winds are expected across the lake
thursday into thursday night. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes thursday night into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 29.9 
inches moves northeast toward the great lakes region, the high 
pressure will be slowly moving northeast toward the new england 
states. winds will turn to southeasterly and remain breezy saturday 
ahead of the approaching low. this low is expected to track 
across the lake late saturday into sunday. rain and thunderstorms 
will be possible across the lake saturday into saturday night. as 
the low exits to the northeast sunday, high pressure around 30.2 
inches is expected to move in from the northern plains for early 
next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130915-
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-
900 pm cdt wed aug 12 2026

sheboygan wi to pentwater mi south...

.rest of tonight...north winds 5 to 10 kt becoming northeast.
areas of fog. waves 1 ft or less. 
.thursday...east winds 5 to 10 kt becoming northeast. areas of 
fog in the morning. chance of showers in the afternoon. waves 1 ft
or less. 
.thursday night...northeast winds 5 to 10 kt becoming east 10 to
15 kt. chance of showers overnight. waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
chance of showers in the morning. waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt becoming east. chance
of showers and thunderstorms in the evening, then chance of
showers overnight. waves 2 to 4 ft building to 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
3 to 5 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. chance of showers and thunderstorms. waves 1 to
3 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. chance of
showers and thunderstorms. waves 1 to 3 ft. 
.monday...north winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 130200
glflm 
expires:202608130915;;089210

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cdt wed aug 12 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 stalled frontal boundary just to the south of lake michigan will 
remain into mid day thursday before retreating south toward the ohio 
river valley. periodic rain, storms and areas of fog will be 
possible across the southern half of the lake until this front 
moves south. light and variable winds are expected across the lake
thursday into thursday night. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes thursday night into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 29.9 
inches moves northeast toward the great lakes region, the high 
pressure will be slowly moving northeast toward the new england 
states. winds will turn to southeasterly and remain breezy saturday 
ahead of the approaching low. this low is expected to track 
across the lake late saturday into sunday. rain and thunderstorms 
will be possible across the lake saturday into saturday night. as 
the low exits to the northeast sunday, high pressure around 30.2 
inches is expected to move in from the northern plains for early 
next week.


lmz261-362-364-366-563-565-567-868-130915-
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-
900 pm cdt wed aug 12 2026

sheboygan wi to pentwater mi north...

.rest of tonight...north winds 5 to 10 kt becoming northeast.
waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves nearly calm. 
.thursday night...northeast winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 to 2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt becoming east. waves
2 to 4 ft. 
.saturday...southeast winds 15 to 25 kt. waves 3 to 5 ft. 
.saturday night...southeast winds 10 to 20 kt becoming southwest.
chance of showers and thunderstorms. waves 1 to 3 ft. 
.sunday...northwest winds 10 to 20 kt becoming north 15 to 25 kt.
waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089300

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed aug 12 2026 /901 pm cdt wed aug 12 2026/

.rest of tonight...north winds 5 to 15 knots. patchy fog after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots backing northeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots backing northwest
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089301

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz263-130800-
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-
1001 pm edt wed aug 12 2026

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

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089302

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt wed aug 12 2026

.rest of tonight...west winds less than 10 knots veering
northwest late. patchy fog by midnight. waves calm to 2 feet. 
.thursday...northwest winds less than 10 knots backing southwest
late. waves calm to 2 feet. 
.thursday night...southwest winds less than 10 knots veering
north after midnight, then veering northeast late. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. 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 veering west
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089303

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt wed aug 12 2026

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

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089304

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz266-130800-
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-
1001 pm edt wed aug 12 2026

.rest of tonight...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
late. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. waves calm to 2 feet.
.saturday night...south winds 10 to 20 knots veering west after
midnight. a chance of showers. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202608130800;;089305

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed aug 12 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...

weak 29.9 inch ridging over lake superior holds through tomorrow 
morning, leading to calm open lake conditions. tomorrow morning, a 
30.2 inch high over the canadian rockies begins to extend stronger 
ridging over lake superior before eventually becoming centered over 
the lake at 30.2 inches friday afternoon. a 29.9 inch trough then 
moves over the western end of the lake saturday afternoon as the 
30.2 inch high moves over the lower great lakes. this trough 
consolidates to a 29.8 inch low as it passes over lake superior, 
reaching ontario by sunday afternoon, with 30.1 inch ridging over 
lake superior to follow.




lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt wed aug 12 2026

.rest of tonight...northwest winds 5 to 15 knots backing west
late. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
late. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...northeast winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. waves calm to 2 feet.
.saturday night...south winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 

$$