fzus61 kbuf 301402
glflo 
expires:202608302100;;609504

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun aug 30 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 frontal boundary north of the lake today will settle 
south across the lake tonight, then stall just southwest of the lake 
monday. the front will then move back northeast across the lake as a 
warm front monday night through early tuesday. the frontal zone will 
continue to meander north and south over or near the lake through 
much of the week.


loz062-302100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt sun aug 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 301402
glflo 
expires:202608302100;;609505

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun aug 30 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 frontal boundary north of the lake today will settle 
south across the lake tonight, then stall just southwest of the lake 
monday. the front will then move back northeast across the lake as a 
warm front monday night through early tuesday. the frontal zone will 
continue to meander north and south over or near the lake through 
much of the week.


loz063>065-302100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun aug 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301338
glfle 
expires:202608302100;;608676

open lake forecast for lake erie
national weather service cleveland oh
938 am edt sun aug 30 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 warm front will lift north across the region today and settle 
across the eastern portion of the lake through tuesday. low 
pressure 29.90 inches moves north of the great lakes wednesday 
passing a cold front through the area on thursday.


lez164>166-302100-
the islands to vermilion oh beyond 5 nm 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-
938 am edt sun aug 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301338
glfle 
expires:202608302100;;608677

open lake forecast for lake erie
national weather service cleveland oh
938 am edt sun aug 30 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 warm front will lift north across the region today and settle 
across the eastern portion of the lake through tuesday. low 
pressure 29.90 inches moves north of the great lakes wednesday 
passing a cold front through the area on thursday.


lez061-167>169-302100-
ripley to buffalo ny extending from 5nm 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-
938 am edt sun aug 30 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301338
glfle 
expires:202608302100;;608675

open lake forecast for lake erie
national weather service cleveland oh
938 am edt sun aug 30 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 warm front will lift north across the region today and settle 
across the eastern portion of the lake through tuesday. low 
pressure 29.90 inches moves north of the great lakes wednesday 
passing a cold front through the area on thursday.


lez162-163-302100-
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-
938 am edt sun aug 30 2026

.rest of today...southwest winds 5 to 10 knots becoming south. a
chance of showers late this morning, then showers early this
afternoon. showers likely with a slight chance of thunderstorms
late. waves 1 foot or less. 
.tonight...southeast winds 5 to 10 knots becoming southwest. a
slight chance of showers and thunderstorms early. waves 1 foot or
less. 
.monday...southwest winds around 10 knots. waves 1 foot or less. 
.monday night...southwest winds 10 to 15 knots. waves 2 feet or
less. 
.tuesday...southwest winds 5 to 15 knots. waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms wednesday night. waves around 1 foot. 
.thursday...west winds 5 to 10 knots becoming northeast. a chance
of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 301346
glfsc 
expires:202608302200;;608892

lake st clair forecast
national weather service detroit/pontiac mi
946 am edt sun aug 30 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 warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lcz460-302200-
lake st clair-
946 am edt sun aug 30 2026

.rest of today...southwest winds 5 to 10 knots. mostly cloudy. light
showers likely in the late morning and early afternoon.. then
showers likely late in the afternoon. waves 2 feet or less.
.tonight...south winds 5 to 10 knots. mostly cloudy. showers likely
early in the evening...then a chance of thunderstorms late in the
evening. a chance of light showers in the late evening and
overnight. waves 2 feet or less.
.monday...southwest winds 5 to 10 knots becoming south 10 to 15
knots early in the afternoon. mostly cloudy. a chance of light
showers early in the morning. waves 2 feet or less.
.monday night...southwest winds 10 to 15 knots. partly cloudy. waves
2 feet or less.
.tuesday...southwest winds 5 to 10 knots. partly cloudy. waves 2
feet or less.
.wednesday...southwest winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.
.thursday...northeast winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 301346
glflh 
expires:202608302200;;608887

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun aug 30 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 warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz361-302200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
946 am edt sun aug 30 2026

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


$$

fzus63 kdtx 301346
glflh 
expires:202608302200;;608888

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun aug 30 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 warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz362-363-302200-
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-
946 am edt sun aug 30 2026

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


$$

fzus63 kdtx 301346
glflh 
expires:202608302200;;608889

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun aug 30 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 warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz462>464-302200-
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-
946 am edt sun aug 30 2026

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


$$

fzus63 kmkx 301410
glflm 
expires:202608302115;;610156

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
910 am cdt sun aug 30 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...

breezy southerly winds are expected today between high pressure 
of 30.1 inches over the northeast u.s. and low pressure of 29.7
inches over the northern plains. breezy southerlies then remain 
into monday as the low lifts northeast from the plains toward 
western lake superior. scattered thunderstorms will occur at times
from early this morning into the first half of the week. a weak 
cold front will finally arrive late tuesday night and wednesday 
with light northerly winds eventually taking hold.


lmz080-669-671-673-675-777-779-870-872-874-876-878-302115-
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-
910 am cdt sun aug 30 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds to 30 kt. chance of showers and
thunderstorms. waves 4 to 6 ft occasionally to 8 ft. 
.tonight...south winds 10 to 20 kt. chance of showers and
thunderstorms in the evening, then slight chance of showers and
thunderstorms overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...south winds 15 to 25 kt. chance of showers in the
morning. waves 4 to 6 ft occasionally to 8 ft. 
.monday night...southwest winds 10 to 20 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south. waves 1 to
3 ft. 
.tuesday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 2 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft. 
.thursday...north winds 10 to 15 kt. chance of showers. waves
1 to 3 ft.  

$$

fzus63 kmkx 301410
glflm 
expires:202608302115;;610155

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
910 am cdt sun aug 30 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...

breezy southerly winds are expected today between high pressure 
of 30.1 inches over the northeast u.s. and low pressure of 29.7
inches over the northern plains. breezy southerlies then remain 
into monday as the low lifts northeast from the plains toward 
western lake superior. scattered thunderstorms will occur at times
from early this morning into the first half of the week. a weak 
cold front will finally arrive late tuesday night and wednesday 
with light northerly winds eventually taking hold.


lmz261-362-364-366-563-565-567-868-302115-
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-
910 am cdt sun aug 30 2026

sheboygan wi to pentwater mi north...

.rest of today...south winds to 30 kt becoming southeast 15 to
25 kt. slight chance of showers late this morning, then slight
chance of showers and thunderstorms this afternoon. waves 4 to
6 ft occasionally to 8 ft. 
.tonight...southeast winds 10 to 20 kt. slight chance of showers
and thunderstorms in the evening, then chance of showers and
thunderstorms overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...south winds 15 to 25 kt. chance of showers and
thunderstorms in the morning. waves 4 to 6 ft occasionally to
8 ft. 
.monday night...south winds 15 to 25 kt becoming west 10 to 15 kt
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.wednesday...southwest winds 10 to 15 kt veering to north. chance
of showers. waves 1 to 2 ft. 
.thursday...north winds 10 to 15 kt. waves 1 to 2 ft.  

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609454

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun aug 30 2026 /901 am cdt sun aug 30 2026/

.rest of today...northeast winds 10 to 20 knots increasing to
20 to 30 knots in the afternoon. a slight chance of showers.
waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...northeast winds 20 to 30 knots veering east after
midnight, then diminishing to 10 to 20 knots late. a chance of
showers and thunderstorms. waves subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots becoming west 10 to 20 knots
in the afternoon, then backing southwest late. a slight chance of
showers and thunderstorms through early afternoon. waves
subsiding to calm to 2 feet. 
.monday night...west winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots veering northeast.
waves calm to 2 feet. 
.thursday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609455

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz263-302000-
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 am edt sun aug 30 2026

.rest of today...east winds 5 to 15 knots becoming northeast
15 to 25 knots in the afternoon. a slight chance of showers.
waves calm to 2 feet building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers and thunderstorms.
waves subsiding to 1 to 3 feet. 
.monday...southeast winds 10 to 20 knots veering south in the
afternoon, then becoming west 5 to 15 knots late. a chance of
showers and a slight chance of thunderstorms. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. a slight chance of showers after midnight. waves
subsiding to calm to 2 feet. 
.tuesday...southwest winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north less
than 10 knots. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots veering east. waves
calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609456

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt sun aug 30 2026

.rest of today...east winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
late. a chance of showers and a slight chance of thunderstorms
after midnight. waves building to 1 to 3 feet. 
.monday...southeast winds 10 to 20 knots becoming southwest 5 to
15 knots late. a chance of showers and a slight chance of
thunderstorms. waves building to 2 to 4 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. a slight chance of showers after midnight. waves
subsiding to calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots. waves building to 1 to
3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds less than 10 knots veering north. waves
calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering east. waves calm to
2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609457

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt sun aug 30 2026

.rest of today...east winds 10 to 20 knots increasing to 15 to
25 knots late. a slight chance of showers by mid afternoon. waves
calm to 2 feet building to 1 to 3 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight. a chance of showers. a slight chance of thunderstorms
after midnight. waves 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. a chance of
showers and a slight chance of thunderstorms. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609458

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz266-302000-
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 am edt sun aug 30 2026

.rest of today...east winds 10 to 20 knots. waves calm to 2 feet.
.tonight...east winds 10 to 20 knots veering southeast after
midnight. a chance of showers and a slight chance of
thunderstorms after midnight. waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots becoming south 10 to
20 knots late. a chance of showers and a slight chance of
thunderstorms. waves building to 2 to 4 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of showers. waves subsiding to calm to
2 feet. 
.tuesday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves building to 1 to 3 feet. 
.tuesday night...southwest winds 10 to 20 knots veering west
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.thursday...north winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 301401
glfls 
expires:202608302000;;609459

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 30 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over the northern plains this morning lifts into the 
canadian prairies tonight and strengthens to 29.4 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering into tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 30.0 
inches then returns to the lake on wednesday. 




lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt sun aug 30 2026

.rest of today...east winds 10 to 20 knots. waves calm to 2 feet.
.tonight...east winds 10 to 20 knots veering southeast after
midnight, then increasing to 15 to 25 knots late. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of showers and thunderstorms. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...south winds 10 to 20 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves subsiding to calm to 2 feet. 
.tuesday...south winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 10 to 20 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 veering north. waves
calm to 2 feet. 

$$