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(1/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/30/2026 2:54 AM America/New_York.
Valid through 6/30/2026 11:00 AM America/New_York.
fzus63 kdtx 300654
glflh
expires:202606301500;;151770
open lake forecast for lake huron
national weather service detroit/pontiac mi
254 am edt tue jun 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 lifts across the region through tuesday.
a hot and humid air mass then takes residence through the week
with modest south to southwest winds. the central great lakes
will largely remain dry and stable through thursday. however, the
prevailing storm track directed over the northern great lakes may
bring occasional rounds of storms to northern lake huron.
lhz361-301500-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
254 am edt tue jun 30 2026
.today...south winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. areas of fog. waves 2 to
4 feet subsiding to 1 to 3 feet in the late morning and
afternoon.
.tonight...west winds 5 to 10 knots veering to the northeast late
in the evening...then veering to the southeast after midnight
becoming south 10 to 15 knots early in the morning. a chance of
thunderstorms in the evening. areas of fog. waves 1 to 3 feet.
.wednesday...west winds 5 to 10 knots. waves 1 to 3 feet.
.wednesday night...east winds 5 to 10 knots veering to the south
by midnight...then becoming southwest 10 to 15 knots after
midnight. showers likely and a chance of thunderstorms. waves
1 to 3 feet.
.thursday...west winds 10 to 15 knots decreasing to 5 to 10 knots
late in the evening. a chance of showers. waves 2 to 4 feet
subsiding to 1 to 3 feet late in the evening.
.friday...west winds 5 to 10 knots. a chance of showers and
thunderstorms early in the evening. a chance of showers by
midnight. waves 2 feet or less.
.saturday...north winds 5 to 10 knots. waves 2 feet or less.
$$
(2/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/30/2026 2:54 AM America/New_York.
Valid through 6/30/2026 11:00 AM America/New_York.
fzus63 kdtx 300654
glflh
expires:202606301500;;151771
open lake forecast for lake huron
national weather service detroit/pontiac mi
254 am edt tue jun 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 lifts across the region through tuesday.
a hot and humid air mass then takes residence through the week
with modest south to southwest winds. the central great lakes
will largely remain dry and stable through thursday. however, the
prevailing storm track directed over the northern great lakes may
bring occasional rounds of storms to northern lake huron.
lhz362-363-301500-
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-
254 am edt tue jun 30 2026
.today...south winds 10 to 15 knots. areas of fog. waves 2 to
4 feet.
.tonight...southwest winds 10 to 15 knots. areas of fog. waves
2 to 4 feet.
.wednesday...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the late morning and afternoon. waves 2 to 4 feet.
.wednesday night...south winds 5 to 10 knots becoming southwest
10 to 15 knots after midnight. a chance of showers after
midnight. waves 2 to 4 feet.
.thursday...southwest winds 10 to 15 knots becoming south 5 to
10 knots late in the afternoon...then becoming light and variable
late in the evening. a chance of showers. waves 2 to 4 feet
subsiding to 1 to 3 feet late in the evening.
.friday...light and variable winds becoming south 5 to 10 knots .
a chance of showers and thunderstorms...then a chance of showers
by midnight. waves 2 feet or less.
.saturday...northwest winds 5 to 10 knots. a chance of showers
early in the morning. waves 2 feet or less.
$$
(3/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/30/2026 2:54 AM America/New_York.
Valid through 6/30/2026 11:00 AM America/New_York.
fzus63 kdtx 300654
glflh
expires:202606301500;;151772
open lake forecast for lake huron
national weather service detroit/pontiac mi
254 am edt tue jun 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 lifts across the region through tuesday.
a hot and humid air mass then takes residence through the week
with modest south to southwest winds. the central great lakes
will largely remain dry and stable through thursday. however, the
prevailing storm track directed over the northern great lakes may
bring occasional rounds of storms to northern lake huron.
lhz462>464-301500-
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-
254 am edt tue jun 30 2026
.today...south winds 10 to 15 knots. waves 1 to 3 feet.
.tonight...southwest winds 10 to 15 knots. waves 2 to 4 feet.
.wednesday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet.
.wednesday night...south winds 5 to 10 knots becoming southwest
10 to 15 knots in the late evening and overnight. waves 1 to
3 feet.
.thursday...southwest winds 10 to 15 knots becoming west 5 to
10 knots late in the evening. a chance of showers late in the
evening. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
evening.
.friday...southwest winds 5 to 10 knots backing to the southeast
early in the evening...then veering to the south by midnight. a
chance of showers early in the morning. a chance of
thunderstorms. rain showers likely . waves 2 feet or less.
.saturday...west winds 5 to 10 knots veering to the north. a
chance of showers early in the morning. waves 2 feet or less.
$$
(4/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 6/30/2026 3:08 AM US/Central.
Valid through 6/30/2026 10:30 AM US/Central.
fzus63 kmkx 300808
glflm
expires:202606301530;;154997
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
308 am cdt tue jun 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...
modest to breezy southerly winds will prevail into thursday then
lighter into friday as high pressure around 30.1 inches remains
to the southeast of the great lakes, while troughs of low pressure
around 29.2 inches continue over canada into the northern great
plains. areas of dense fog may develop during the day due to a
very humid airmass flowing over the cooler waters of the lake.
scattered thunderstorms are forecast across the northern half
tonight through wednesday night, and across the southern two
thirds thursday into friday, and across the whole lake friday into
saturday as a cold front shifts winds to northerly.
lmz080-671-673-675-777-779-872-874-876-878-301530-
lake michigan from michigan city in to st. joseph mi 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 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-
308 am cdt tue jun 30 2026
port washington wi to whitehall mi south...
.today...south winds 10 to 20 kt increasing to 15 to 25 kt. waves
3 to 5 ft.
.tonight...southwest winds 10 to 20 kt. waves 3 to 5 ft.
.wednesday...southwest winds 10 to 20 kt becoming south. waves
3 to 5 ft.
.wednesday night...southwest winds 10 to 20 kt increasing to
15 to 25 kt. waves 3 to 5 ft.
.thursday...southwest winds 10 to 20 kt. waves 3 to 5 ft.
.thursday night...southwest winds 10 to 15 kt. chance of showers
and thunderstorms. waves 1 to 3 ft.
.friday...southwest winds 10 to 15 kt becoming south. chance of
showers. waves 1 to 2 ft.
.saturday...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 3 ft.
$$
(5/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 6/30/2026 3:08 AM US/Central.
Valid through 6/30/2026 10:30 AM US/Central.
fzus63 kmkx 300808
glflm
expires:202606301530;;154996
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
308 am cdt tue jun 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...
modest to breezy southerly winds will prevail into thursday then
lighter into friday as high pressure around 30.1 inches remains
to the southeast of the great lakes, while troughs of low pressure
around 29.2 inches continue over canada into the northern great
plains. areas of dense fog may develop during the day due to a
very humid airmass flowing over the cooler waters of the lake.
scattered thunderstorms are forecast across the northern half
tonight through wednesday night, and across the southern two
thirds thursday into friday, and across the whole lake friday into
saturday as a cold front shifts winds to northerly.
lmz261-362-364-366-563-565-567-669-868-870-301530-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
308 am cdt tue jun 30 2026
port washington wi to whitehall mi north...
.today...south winds 15 to 25 kt increasing to 30 kt. slight
chance of showers and thunderstorms this morning. waves 4 to 6 ft
occasionally to 8 ft.
.tonight...south winds to 30 kt becoming southwest 15 to 25 kt.
chance of showers and slight chance of thunderstorms. waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.wednesday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. chance of thunderstorms in the afternoon. waves 3 to 5 ft.
.wednesday night...south winds 15 to 25 kt becoming southwest.
chance of showers and thunderstorms in the evening, then showers
overnight. waves 3 to 5 ft.
.thursday...southwest winds 15 to 25 kt. waves 3 to 5 ft.
.thursday night...southwest winds 10 to 20 kt diminishing to
10 to 15 kt. chance of showers and thunderstorms. waves 2 to
4 ft.
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 2 ft.
.saturday...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft.
$$
(6/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154160
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
lsz264-302000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
359 am edt tue jun 30 2026
...dense fog advisory in effect until 8 am edt this morning...
.early this morning...south winds 10 to 20 knots. patchy dense
fog. a slight chance of showers and thunderstorms. waves 3 to
5 feet occasionally to 7 feet.
.today...south winds 5 to 15 knots increasing to 10 to 20 knots
late. areas of dense fog. a slight chance of showers and
thunderstorms by mid afternoon. waves subsiding to 1 to 3 feet.
.tonight...south winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. patchy fog. waves 1 to 3 feet.
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves building to 2 to 4 feet.
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of thunderstorms
through midnight. a chance of showers. waves subsiding to 1 to
3 feet.
.thursday...southwest winds 10 to 20 knots. waves 1 to 3 feet.
.thursday night...west winds 5 to 15 knots veering north after
midnight. waves subsiding to calm to 2 feet.
.friday...east winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet.
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet.
$$
(7/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154161
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
lsz265-302000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
359 am edt tue jun 30 2026
.early this morning...south winds 15 to 25 knots. patchy fog. a
slight chance of showers and thunderstorms. waves 2 to 4 feet.
.today...south winds 10 to 20 knots backing southeast late.
patchy fog through early afternoon. a chance of showers. a chance
of thunderstorms by mid afternoon. some thunderstorms may be
severe. waves subsiding to calm to 2 feet.
.tonight...south winds 10 to 20 knots veering southwest after
midnight. a slight chance of showers and thunderstorms through
midnight. some thunderstorms may be severe. waves calm to 2 feet.
.wednesday...south winds 10 to 20 knots. a chance of showers and
a slight chance of thunderstorms by mid afternoon. waves calm to
2 feet.
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of showers and thunderstorms. waves calm
to 2 feet.
.thursday...west winds 10 to 20 knots. waves calm to 2 feet.
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet.
.friday...east winds 5 to 15 knots backing north. a chance of
showers. waves calm to 2 feet.
.saturday...northeast winds 5 to 15 knots backing north. a chance
of showers. waves calm to 2 feet.
$$
(8/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154162
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
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-
359 am edt tue jun 30 2026
.early this morning...south winds 20 to 30 knots. patchy fog. a
slight chance of showers and thunderstorms. waves 3 to 5 feet
occasionally to 7 feet.
.today...south winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing southeast late. areas of dense fog
through early afternoon. a chance of showers and thunderstorms.
some thunderstorms may be severe. waves subsiding to calm to
2 feet.
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
a chance of showers and thunderstorms through midnight. patchy
fog. some thunderstorms may be severe. waves building to 1 to
3 feet.
.wednesday...southwest winds 10 to 20 knots becoming south 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. areas of dense fog through early afternoon. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves subsiding to calm to 2 feet.
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. showers likely through midnight. a chance of
thunderstorms. a slight chance of showers after midnight. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.thursday...west winds 5 to 15 knots. waves building to 1 to
3 feet.
.thursday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet.
.friday...northeast winds 5 to 15 knots backing north. a chance
of showers. waves calm to 2 feet.
.saturday...north winds 5 to 15 knots. waves calm to 2 feet.
$$
(9/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154163
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
lsz267-302000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
359 am edt tue jun 30 2026
.early this morning...south winds 15 to 25 knots. patchy fog. a
slight chance of showers and thunderstorms. waves 2 to 4 feet.
.today...south winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then becoming southeast 5 to 15 knots late.
patchy fog through early afternoon. a chance of showers and
thunderstorms. some thunderstorms may be severe. waves subsiding
to calm to 2 feet.
.tonight...south winds 10 to 20 knots veering southwest after
midnight, then diminishing to 5 to 15 knots late. patchy dense
fog. a chance of thunderstorms through midnight. a chance of
showers. a slight chance of thunderstorms after midnight. some
thunderstorms may be severe through midnight. waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.wednesday...southwest winds 5 to 15 knots backing south in the
afternoon. areas of dense fog through early afternoon. a slight
chance of showers by mid afternoon. waves calm to 2 feet.
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.thursday...west winds 5 to 15 knots. waves calm to 2 feet.
.thursday night...southwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet.
.friday...north winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet.
.saturday...northwest winds 5 to 15 knots. waves calm to 2 feet.
$$
(10/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154158
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
359 am edt tue jun 30 2026 /259 am cdt tue jun 30 2026/
.early this morning...southwest winds 5 to 15 knots. patchy fog.
waves 1 to 3 feet.
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. patchy fog through early afternoon. waves
subsiding to calm to 2 feet.
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves calm to 2 feet.
.wednesday...southwest winds 10 to 20 knots. a chance of showers
and a slight chance of thunderstorms by mid afternoon. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.wednesday night...southwest winds 5 to 15 knots. a chance of
showers and thunderstorms through midnight. waves calm to 2 feet.
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet.
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet.
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet.
$$
(11/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/30/2026 4:00 AM America/New_York.
Valid through 6/30/2026 4:00 PM America/New_York.
fzus63 kmqt 300800
glfls
expires:202606302000;;154159
open lake forecast for lake superior
national weather service marquette mi
359 am edt tue jun 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 29.4 inch low will rotate around lake winnipeg, deepening to 29.1
inches this morning. this low wobbles around southern manitoba
today, weakening to 29.5 inches as it crosses northern ontario
tomorrow. thursday morning, the low will further weaken to 29.6
inches over northern quebec while 30.0 inch high pressure builds
over the us southeast and northern manitoba and broad 29.8 inch low
pressure spreads over the high plains. friday into the weekend, the
high over canada moves into hudson bay, building to 30.1 inches.
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-
359 am edt tue jun 30 2026
...dense fog advisory in effect until 8 am edt this morning...
.early this morning...south winds 10 to 20 knots. patchy dense
fog. a slight chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet.
.today...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. patchy dense fog. a slight chance of
showers and thunderstorms by mid afternoon. some thunderstorms
may be severe. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.wednesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet.
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of showers and
thunderstorms through midnight. waves subsiding to calm to
2 feet.
.thursday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.thursday night...west winds 5 to 15 knots veering northeast
after midnight. waves subsiding to calm to 2 feet.
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet.
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet.
$$
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