fzus61 kbuf 300802
glflo 
expires:202608301500;;596617

open lake forecast for lake ontario
national weather service buffalo ny
402 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>065-301500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun aug 30 2026

.today...southwest winds 5 to 15 knots becoming west. a chance of
showers. 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 kbuf 300802
glflo 
expires:202608301500;;596616

open lake forecast for lake ontario
national weather service buffalo ny
402 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.


loz062-301500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sun aug 30 2026

.today...southwest winds 5 to 10 knots. a chance of showers late
this morning. 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 kcle 300739
glfle 
expires:202608301415;;595920

open lake forecast for lake erie
national weather service cleveland oh
339 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...
high pressure 30.20 inches over the mid-atlantic continues to 
influence lake erie. 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>166-301415-
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-
339 am edt sun aug 30 2026

.today...southwest winds 5 to 10 knots becoming south. a slight
chance of showers this afternoon. 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 300739
glfle 
expires:202608301415;;595921

open lake forecast for lake erie
national weather service cleveland oh
339 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...
high pressure 30.20 inches over the mid-atlantic continues to 
influence lake erie. 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>169-301415-
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-
339 am edt sun aug 30 2026

.today...southwest winds 5 to 10 knots. a slight chance of
showers late this morning. a chance of showers early this
afternoon, then a chance of showers 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 300739
glfle 
expires:202608301415;;595919

open lake forecast for lake erie
national weather service cleveland oh
339 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...
high pressure 30.20 inches over the mid-atlantic continues to 
influence lake erie. 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. 


lez162-163-301415-
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-
339 am edt sun aug 30 2026

.today...southwest winds 5 to 10 knots becoming south. a slight
chance of showers through early afternoon. waves 1 foot or less. 
.tonight...southeast winds 5 to 10 knots becoming southwest. a
chance of showers 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 300721
glfsc 
expires:202608301530;;595440

lake st clair forecast
national weather service detroit/pontiac mi
321 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...the great lakes are located in between the exiting
high pressure system, 30.30 inches, centered over the mid
atlantic coast and low pressure, 29.70 inches, developing over
the dakotas. active pattern returns late today into monday as a 
warm front lifts through the area bringing showers and storms.


lcz460-301530-
lake st clair-
321 am edt sun aug 30 2026

.today...south winds 5 to 10 knots. mostly cloudy. showers likely in
the late morning and afternoon. waves 2 feet or less.
.tonight...southeast winds 5 to 10 knots veering to the southwest
early in the morning. 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. mostly cloudy. a chance of
light showers early in the morning. waves 2 feet or less.
.monday night...south winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. 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 300721
glflh 
expires:202608301530;;595437

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 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...the great lakes are located in between the exiting
high pressure system, 30.30 inches, centered over the mid
atlantic coast and low pressure, 29.70 inches, developing over
the dakotas. active pattern returns late today into monday as a 
warm front lifts through the area bringing showers and storms.


lhz362-363-301530-
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-
321 am edt sun aug 30 2026

.today...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and early afternoon...then becoming
southeast 5 to 10 knots late in the afternoon. showers likely in
the morning...then a chance of showers in the afternoon. waves
2 feet or less. 
.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 5 to 10 knots veering to the
south after midnight. a chance of showers and thunderstorms in
the evening. waves 2 feet or less. 
.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 300721
glflh 
expires:202608301530;;595438

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 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...the great lakes are located in between the exiting
high pressure system, 30.30 inches, centered over the mid
atlantic coast and low pressure, 29.70 inches, developing over
the dakotas. active pattern returns late today into monday as a 
warm front lifts through the area bringing showers and storms.


lhz462>464-301530-
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-
321 am edt sun aug 30 2026

.today...southeast winds 5 to 10 knots veering to the south late
in the morning...then increasing to 10 to 15 knots early in the
afternoon decreasing to 5 to 10 knots late in the afternoon.
showers in the morning...then showers and a chance of
thunderstorms in the afternoon. waves 2 feet or less. 
.tonight...southeast 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 5 to 10 knots increasing to 10 to
15 knots by midnight...then decreasing to 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 kdtx 300721
glflh 
expires:202608301530;;595436

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 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...the great lakes are located in between the exiting
high pressure system, 30.30 inches, centered over the mid
atlantic coast and low pressure, 29.70 inches, developing over
the dakotas. active pattern returns late today into monday as a 
warm front lifts through the area bringing showers and storms.


lhz361-301530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
321 am edt sun aug 30 2026

.today...southeast winds 5 to 10 knots. a chance of showers 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...southeast winds 5 to 10 knots veering to the
south after midnight. a chance of showers in the evening. waves
1 to 3 feet. 
.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 kmkx 300815
glflm 
expires:202608301530;;597700

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
315 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 
around 30.2 inches and high pressure of 30.1 inches over the
northeast us. breezy southerlies then remain into monday as the 
low will lift 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.


lmz261-362-364-366-563-565-567-868-301530-
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-
315 am cdt sun aug 30 2026

sheboygan wi to pentwater mi north...

.today...south winds 15 to 25 kt becoming southeast 10 to 20 kt.
chance of showers and slight chance of thunderstorms. 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
slight chance of thunderstorms overnight. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.monday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
chance of showers in the morning. waves 2 to 4 ft building to
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 kmkx 300815
glflm 
expires:202608301530;;597701

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
315 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 
around 30.2 inches and high pressure of 30.1 inches over the
northeast us. breezy southerlies then remain into monday as the 
low will lift 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-301530-
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-
315 am cdt sun aug 30 2026

sheboygan wi to pentwater mi south...

.today...south winds 15 to 25 kt. chance of showers and slight
chance of thunderstorms this morning, then slight chance of
showers and thunderstorms this afternoon. waves 4 to 7 ft
occasionally to 9 ft. 
.tonight...south winds 10 to 20 kt. slight chance of showers and
thunderstorms. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...south winds 10 to 20 kt increasing to 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 3 to 5 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 kmqt 300801
glfls 
expires:202608302000;;596495

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




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

.early this morning...south winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots backing east in the
afternoon. patchy fog through early afternoon. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots veering southeast after
midnight, then increasing to 15 to 25 knots late. patchy fog
after midnight. a chance of showers 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 a slight chance of
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. 

$$

fzus63 kmqt 300801
glfls 
expires:202608302000;;596490

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sun aug 30 2026 /301 am cdt sun aug 30 2026/

.early this morning...northeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...northeast winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. patchy fog. a slight chance of
showers. waves 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. patchy fog. a
chance of showers and a slight chance of 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 300801
glfls 
expires:202608302000;;596491

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




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-
401 am edt sun aug 30 2026

.early this morning...east winds 5 to 15 knots. patchy fog. waves
calm to 2 feet. 
.today...east winds 5 to 15 knots becoming northeast 15 to
25 knots in the afternoon. patchy fog. a slight chance of showers
by mid afternoon. waves building to 2 to 4 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. patchy fog. a chance of showers. a
slight chance of thunderstorms after midnight. 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. patchy dense
fog through early afternoon. 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 300801
glfls 
expires:202608302000;;596492

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




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

.early this morning...east winds less than 10 knots. areas of
dense fog. waves calm to 2 feet. 
.today...east winds 5 to 15 knots increasing to 10 to 20 knots
late. patchy fog. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
late. patchy fog. a chance of showers after midnight. waves
building to 1 to 3 feet. 
.monday...southeast winds 10 to 20 knots becoming southwest 5 to
15 knots late. patchy fog through early afternoon. 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 300801
glfls 
expires:202608302000;;596493

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




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

.early this morning...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...east winds 10 to 20 knots increasing to 15 to 25 knots
late. patchy fog. a slight chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight. patchy fog. a chance of showers. 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 300801
glfls 
expires:202608302000;;596494

open lake forecast for lake superior
national weather service marquette mi
401 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 central and northern plains this morning 
lifts north into the canadian prairies the rest of today into 
tonight. the then 29.4 inch low over the canadian prairies on monday 
is projected to bring 29.8 inch troughing over lake superior by late 
in the day. weak high pressure ridging of 29.9 inches looks to make 
a quick return on tuesday before being replaced by weak 29.8 inch 
troughing tuesday evening. weak ridging of around 29.9 inches then 
returns to the lake on wednesday, strengthening to 30.0 inches 
wednesday night into thursday morning. 




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-
401 am edt sun aug 30 2026

.early this morning...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...east winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon. patchy fog. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots veering southeast after
midnight. patchy fog. a chance of showers after midnight. waves
building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots becoming south 10 to
20 knots late. patchy dense fog through early afternoon. 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. 

$$