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(1/12)
Latest Great Lakes Marine Forecast by KBUF
Issued 8/29/2026 10:02 PM America/New_York.
Valid through 8/30/2026 5:00 AM America/New_York.
fzus61 kbuf 300202
glflo
expires:202608300900;;582140
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat aug 29 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a high pressure ridge averaging 30.2 inches exits slowly
toward new england through sunday before a weak cold front drifts
southward across lake ontario sunday night. behind the front, a
ridge averaging 30.1 inches builds from eastern canada through
tuesday. that ridge should exit eastward tuesday night and allow a
warm front to sweep northward across lake ontario. a cold front
should sweep eastward across the lake late wednesday. behind the
cold front, a trough averaging 29.9 inches should linger over lake
ontario through thursday.
loz062-300900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt sat aug 29 2026
.overnight...southwest winds 5 to 10 knots. waves 1 to
2 feet.
.sunday...southwest winds 5 to 10 knots becoming west. showers
likely in the afternoon. waves 1 foot or less.
.sunday night...southwest winds 10 knots or less becoming
southeast. showers. waves 1 foot or less.
.monday...east winds 10 knots or less. a chance of showers in the
morning, then showers likely in the afternoon. waves 1 foot or
less.
.monday night...east winds 5 to 10 knots becoming southeast.
showers likely. waves 1 foot or less.
.tuesday...south winds 5 to 10 knots. showers likely. waves
1 foot 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. showers
likely during the day, then a chance of showers thursday night.
waves 1 foot or less.
winds and waves higher in and near thunderstorms.
$$
(2/12)
Latest Great Lakes Marine Forecast by KBUF
Issued 8/29/2026 10:02 PM America/New_York.
Valid through 8/30/2026 5:00 AM America/New_York.
fzus61 kbuf 300202
glflo
expires:202608300900;;582141
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sat aug 29 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a high pressure ridge averaging 30.2 inches exits slowly
toward new england through sunday before a weak cold front drifts
southward across lake ontario sunday night. behind the front, a
ridge averaging 30.1 inches builds from eastern canada through
tuesday. that ridge should exit eastward tuesday night and allow a
warm front to sweep northward across lake ontario. a cold front
should sweep eastward across the lake late wednesday. behind the
cold front, a trough averaging 29.9 inches should linger over lake
ontario through thursday.
loz063>065-300900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sat aug 29 2026
.overnight...southwest winds 10 to 15 knots. waves 2 feet
or less.
.sunday...southwest winds 5 to 15 knots becoming west. a chance
of showers in the afternoon. waves 2 feet or less.
.sunday night...west winds 10 knots or less becoming northwest. a
chance of showers. waves 2 feet or less.
.monday...east winds less than 10 knots. a chance of showers in
the afternoon. waves 1 foot or less.
.monday night...east winds 10 knots or less becoming south.
showers likely. waves 1 foot or less.
.tuesday...south winds 5 to 10 knots. showers likely. waves
1 foot or less.
.wednesday...south winds 5 to 10 knots becoming southwest.
showers likely with a chance of thunderstorms. waves 2 feet or
less.
.thursday...west winds 5 to 10 knots becoming northwest. showers
likely during the day, then a chance of showers thursday night.
waves 1 to 2 feet.
winds and waves higher in and near thunderstorms.
$$
(3/12)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/30/2026 3:39 AM America/New_York.
Valid through 8/30/2026 10:15 AM America/New_York.
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.
$$
(4/12)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/30/2026 3:39 AM America/New_York.
Valid through 8/30/2026 10:15 AM America/New_York.
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.
$$
(5/12)
Latest Great Lakes Marine Forecast by KCLE
Issued 8/30/2026 3:39 AM America/New_York.
Valid through 8/30/2026 10:15 AM America/New_York.
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.
$$
(6/12)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/30/2026 3:21 AM America/New_York.
Valid through 8/30/2026 11:30 AM America/New_York.
fzus63 kdtx 300721
glflh
expires:202608301530;;595436
open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt sun aug 30 2026
for waters beyond five nautical miles off shore on lake huron
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...the great lakes are located in between the exiting
high pressure system, 30.30 inches, centered over the mid
atlantic coast and low pressure, 29.70 inches, developing over
the dakotas. active pattern returns late today into monday as a
warm front lifts through the area bringing showers and storms.
lhz361-301530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
321 am edt sun aug 30 2026
.today...southeast winds 5 to 10 knots. a chance of showers in
the morning. waves 2 feet or less.
.tonight...east winds 5 to 10 knots. waves 2 feet or less.
.monday...southeast winds 10 to 15 knots becoming east 5 to
10 knots early in the afternoon. a chance of showers in the
morning...then a chance of showers and thunderstorms in the
afternoon. waves 1 to 3 feet.
.monday night...southeast winds 5 to 10 knots veering to the
south after midnight. a chance of showers in the evening. waves
1 to 3 feet.
.tuesday...west winds 5 to 10 knots backing to the south late in
the morning...then veering to the south 5 to 10 knots late in the
afternoon veering to the southeast late in the evening. waves
2 feet or less.
.wednesday...west winds 5 to 10 knots veering to the northwest by
midnight. waves 2 feet or less.
.thursday...northwest winds 5 to 10 knots until afternoon
becoming light and variable...then becoming northwest 5 to
10 knots by midnight. waves 2 feet or less.
$$
(7/12)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/30/2026 3:21 AM America/New_York.
Valid through 8/30/2026 11:30 AM America/New_York.
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.
$$
(8/12)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/30/2026 3:21 AM America/New_York.
Valid through 8/30/2026 11:30 AM America/New_York.
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.
$$
(9/12)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/30/2026 3:21 AM America/New_York.
Valid through 8/30/2026 11:30 AM America/New_York.
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.
$$
(10/12)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/29/2026 9:05 PM US/Central.
Valid through 8/30/2026 4:15 AM US/Central.
fzus63 kmkx 300205
glflm
expires:202608300915;;582298
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
905 pm cdt sat aug 29 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...
high pressure around 30.2 inches will continue to move east of
the lower great lakes tonight, while low pressure deepens to
around 29.6 inches in the central great plains. this will support
modest to breezy southerly winds. tonight a warm front is
expected to lift northward over the lake, and the presence of a
jet aloft may cause some gusty southerly winds to 30 knots over
the south half of the lake on sunday.
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 tonight into next week. a
weak cold front will finally arrive late tuesday night and
wednesday with light northerly winds eventually taking hold.
lmz261-362-364-366-563-565-567-868-300915-
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-
905 pm cdt sat aug 29 2026
sheboygan wi to pentwater mi north...
.rest of tonight...south winds 15 to 25 kt. chance of showers and
slight chance of thunderstorms. waves 3 to 5 ft.
.sunday...south winds 10 to 20 kt becoming southeast. chance of
showers and slight chance of thunderstorms. waves 4 to 6 ft
occasionally to 8 ft.
.sunday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. chance of showers 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. waves 3 to 5 ft.
.monday night...south winds 15 to 25 kt becoming west 10 to 15 kt
overnight. chance of showers overnight. waves 3 to 5 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. chance of showers. waves 1 to 2 ft.
.wednesday...southwest winds 10 to 15 kt veering to north. waves
1 to 2 ft.
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.
$$
(11/12)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/29/2026 9:05 PM US/Central.
Valid through 8/30/2026 4:15 AM US/Central.
fzus63 kmkx 300205
glflm
expires:202608300915;;582299
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
905 pm cdt sat aug 29 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...
high pressure around 30.2 inches will continue to move east of
the lower great lakes tonight, while low pressure deepens to
around 29.6 inches in the central great plains. this will support
modest to breezy southerly winds. tonight a warm front is
expected to lift northward over the lake, and the presence of a
jet aloft may cause some gusty southerly winds to 30 knots over
the south half of the lake on sunday.
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 tonight into next week. a
weak cold front will finally arrive late tuesday night and
wednesday with light northerly winds eventually taking hold.
lmz080-669-671-673-675-777-779-870-872-874-876-878-300915-
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-
905 pm cdt sat aug 29 2026
sheboygan wi to pentwater mi south...
.rest of tonight...south winds 15 to 25 kt. slight chance of
showers late this evening, then chance of showers and
thunderstorms overnight. waves 3 to 5 ft.
.sunday...south winds to 30 kt diminishing to 15 to 25 kt. chance
of showers and slight chance of thunderstorms in the morning,
then slight chance of showers and thunderstorms in the afternoon.
waves 4 to 6 ft occasionally to 8 ft.
.sunday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. 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 3 to 5 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 increasing to 10 to 20 kt.
waves 1 to 3 ft.
$$
(12/12)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/30/2026 4:01 AM America/New_York.
Valid through 8/30/2026 4:00 PM America/New_York.
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.
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