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(1/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/25/2026 3:32 AM America/New_York.
Valid through 8/25/2026 11:45 AM America/New_York.
fzus63 kdtx 250732
glflh
expires:202608251545;;323657
open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am edt tue aug 25 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...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.
lhz361-251545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
332 am edt tue aug 25 2026
.today...light and variable winds. waves 2 feet or less.
.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots early in the morning. waves 2 feet or less.
.wednesday...south winds 10 to 15 knots. a chance of showers in
the morning...then showers and a chance of thunderstorms in the
afternoon. waves 1 to 3 feet.
.wednesday night...south winds 5 to 10 knots veering to the
southwest by midnight...then becoming west 10 to 15 knots after
midnight. showers and a chance of thunderstorms in the evening.
waves 1 to 3 feet.
.thursday...northwest winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon...then decreasing to 10 to
15 knots late in the evening. waves 1 to 3 feet building to 2 to
4 feet late in the afternoon.
.friday...north winds 5 to 10 knots backing to the west early in
the evening...then veering to the west 5 to 10 knots by midnight.
waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots backing to the south.
waves 2 feet or less.
$$
(2/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/25/2026 3:32 AM America/New_York.
Valid through 8/25/2026 11:45 AM America/New_York.
fzus63 kdtx 250732
glflh
expires:202608251545;;323658
open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am edt tue aug 25 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...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.
lhz362-363-251545-
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-
332 am edt tue aug 25 2026
.today...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less.
.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots after midnight. waves 2 feet or less.
.wednesday...south winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. showers likely and a chance of
thunderstorms in the afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon.
.wednesday night...south winds 10 to 15 knots veering to the
southwest after midnight. showers likely and a chance of
thunderstorms in the evening. waves 2 to 4 feet.
.thursday...northwest winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon...then becoming north 10 to
15 knots late in the evening. waves 1 to 3 feet building to 3 to
5 feet late in the afternoon.
.friday...north winds 10 to 15 knots becoming light and variable.
waves 1 to 3 feet.
.saturday...southwest winds 5 to 10 knots backing to the south
early in the evening...then increasing to 10 to 15 knots by
midnight. waves 2 feet or less.
$$
(3/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/25/2026 3:32 AM America/New_York.
Valid through 8/25/2026 11:45 AM America/New_York.
fzus63 kdtx 250732
glflh
expires:202608251545;;323659
open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am edt tue aug 25 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...high pressure, 30.10 inches, will begin to work in
across the great lakes tonight through tomorrow. this will bring
lighter winds and dry weather to the area. a cold front will then
move through on wednesday, bringing elevated winds across lake
huron along with increasing chances for rain showers and
thunderstorms.
lhz462>464-251545-
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-
332 am edt tue aug 25 2026
.today...northwest winds 5 to 10 knots in the morning becoming
light and variable. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon.
.tonight...east winds 5 to 10 knots veering to the southeast late
in the evening...then becoming south 10 to 15 knots after
midnight. waves 2 feet or less.
.wednesday...south winds 10 to 15 knots. a chance of showers in
the afternoon. waves 1 to 3 feet building to 2 to 4 feet early in
the afternoon.
.wednesday night...south winds 10 to 15 knots. showers likely and
a chance of thunderstorms in the evening. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight.
.thursday...west winds 10 to 15 knots becoming northwest 5 to
10 knots late in the morning...then becoming 10 to 15 knots late
in the evening. waves 1 to 3 feet.
.friday...north winds 10 to 15 knots decreasing to 5 to 10 knots
. waves 1 to 3 feet.
.saturday...southeast winds 5 to 10 knots becoming south 10 to
15 knots by midnight. waves 2 feet or less.
$$
(4/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/25/2026 3:03 AM US/Central.
Valid through 8/25/2026 10:30 AM US/Central.
fzus63 kmkx 250803
glflm
expires:202608251530;;324540
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 am cdt tue aug 25 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 of 30.1 inches centered over southern lake michigan
will exit the region as low pressure system around 29.7 inches
approaches from the northern plains. as the low crosses lake
superior east, an associated cold front will move across lake
michigan wednesday. showers and thunderstorms will accompany the
approaching/passing surface low and cold front tonight into
wednesday. an isolated stronger storm with hail and gusty winds
will be possible but chances are low. increasing southerly winds
today will shift to the northwest late wednesday afternoon/evening.
breezy northwest winds are expected through wednesday night.
high pressure around 30.1 inches will gradually build in from the
northern plains behind this exiting low for thursday and friday.
light north to northeast winds are expected.
lmz080-669-671-673-675-777-779-870-872-874-876-878-251530-
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-
303 am cdt tue aug 25 2026
sheboygan wi to pentwater mi south...
.today...south winds 5 to 10 kt increasing to 15 to 25 kt. waves
1 ft or less building to 3 to 5 ft.
.tonight...south winds 15 to 25 kt becoming southwest. slight
chance of showers and thunderstorms overnight. waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.
.wednesday...southwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of showers. waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft.
.thursday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft.
.thursday night...north winds 10 to 20 kt becoming northeast
10 to 15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft.
.friday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft.
.saturday...south winds 10 to 20 kt increasing to 30 kt. waves
1 to 3 ft building to 3 to 5 ft.
$$
(5/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/25/2026 3:03 AM US/Central.
Valid through 8/25/2026 10:30 AM US/Central.
fzus63 kmkx 250803
glflm
expires:202608251530;;324539
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 am cdt tue aug 25 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 of 30.1 inches centered over southern lake michigan
will exit the region as low pressure system around 29.7 inches
approaches from the northern plains. as the low crosses lake
superior east, an associated cold front will move across lake
michigan wednesday. showers and thunderstorms will accompany the
approaching/passing surface low and cold front tonight into
wednesday. an isolated stronger storm with hail and gusty winds
will be possible but chances are low. increasing southerly winds
today will shift to the northwest late wednesday afternoon/evening.
breezy northwest winds are expected through wednesday night.
high pressure around 30.1 inches will gradually build in from the
northern plains behind this exiting low for thursday and friday.
light north to northeast winds are expected.
lmz261-362-364-366-563-565-567-868-251530-
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-
303 am cdt tue aug 25 2026
sheboygan wi to pentwater mi north...
.today...southwest winds 5 to 10 kt becoming south 15 to 25 kt.
waves 1 to 2 ft building to 3 to 5 ft.
.tonight...south winds 15 to 25 kt. slight chance of showers in
the evening, then chance of showers and slight chance of
thunderstorms overnight. waves 4 to 6 ft occasionally to 8 ft.
.wednesday...southwest winds to 30 kt. showers likely in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.wednesday night...northwest winds 15 to 25 kt diminishing to
10 to 20 kt. chance of showers and thunderstorms in the evening.
waves 2 to 4 ft subsiding to 1 to 3 ft.
.thursday...northwest winds 15 to 25 kt becoming north. waves
2 to 4 ft.
.thursday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 1 to 3 ft.
.friday...north winds 10 to 15 kt. waves 1 to 2 ft.
.saturday...south winds 10 to 20 kt increasing to 30 kt. waves
1 to 3 ft building to 3 to 5 ft.
$$
(6/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324362
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz264-252000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue aug 25 2026
.early this morning...south winds less than 10 knots. waves calm
to 2 feet.
.today...south winds 5 to 15 knots backing southeast in the
afternoon. showers likely and a slight chance of thunderstorms by
mid afternoon. waves calm to 2 feet.
.tonight...southeast winds 5 to 15 knots veering southwest late.
showers likely through midnight. a chance of thunderstorms. a
chance of showers after midnight. waves building to 1 to 3 feet.
.wednesday...west winds 10 to 20 knots veering northwest late. a
slight chance of showers through early afternoon. waves subsiding
to calm to 2 feet.
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. a slight chance of showers through midnight.
waves building to 1 to 3 feet.
.thursday...north winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet.
.thursday night...northwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet.
.friday...northwest winds 5 to 15 knots backing south. waves calm
to 2 feet.
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet.
$$
(7/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324363
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz265-252000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue aug 25 2026
.early this morning...south winds 5 to 15 knots. waves calm to
2 feet.
.today...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves calm to 2 feet.
.tonight...southeast winds 10 to 20 knots becoming south 15 to
25 knots after midnight. a chance of showers and thunderstorms.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.wednesday...west winds 15 to 25 knots becoming northwest 20 to
30 knots late. a slight chance of showers and thunderstorms.
waves building to 1 to 3 feet.
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. a slight chance of showers. waves
building to 2 to 4 feet.
.thursday...north winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet.
.thursday night...north winds 10 to 20 knots. waves subsiding to
calm to 2 feet.
.friday...north winds 5 to 15 knots veering south. waves calm to
2 feet.
.saturday...southeast winds 10 to 20 knots becoming south 15 to
25 knots. a chance of showers. waves calm to 2 feet.
$$
(8/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324364
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz266-252000-
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-
400 am edt tue aug 25 2026
.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet.
.today...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. a slight
chance of showers by mid afternoon. waves calm to 2 feet.
.tonight...south winds 15 to 25 knots diminishing to 10 to
20 knots late. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 2 to 4 feet.
.wednesday...southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon, then veering northwest late. a chance
of showers and a slight chance of thunderstorms. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet.
.wednesday night...northwest winds 15 to 25 knots. a slight
chance of showers. waves subsiding to 1 to 3 feet, then building
to 3 to 5 feet occasionally to 7 feet.
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet.
.thursday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet.
.friday...northwest winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet.
.saturday...south winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet.
$$
(9/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324365
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz267-252000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue aug 25 2026
.early this morning...west winds 5 to 15 knots. patchy fog. waves
calm to 2 feet.
.today...southwest winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. waves calm to
2 feet.
.tonight...south winds 15 to 25 knots. showers and a chance of
thunderstorms. waves building to 2 to 4 feet.
.wednesday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then veering west late. showers likely
through early afternoon. a chance of thunderstorms. a chance of
showers by mid afternoon. waves subsiding to calm to 2 feet.
.wednesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of showers. waves
building to 3 to 5 feet occasionally to 7 feet.
.thursday...northwest winds 15 to 25 knots. waves subsiding to
2 to 4 feet.
.thursday night...north winds 10 to 20 knots. waves subsiding to
calm to 2 feet.
.friday...northwest winds 5 to 15 knots backing south. waves calm
to 2 feet.
.saturday...south winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet.
$$
(10/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324360
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz162-252000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue aug 25 2026 /300 am cdt tue aug 25 2026/
.early this morning...east winds less than 10 knots. waves calm
to 2 feet.
.today...south winds 5 to 15 knots backing east in the afternoon.
a chance of showers and thunderstorms. waves calm to 2 feet.
.tonight...east winds 5 to 15 knots veering west after midnight,
then increasing to 10 to 20 knots late. a chance of showers and
thunderstorms through midnight. waves calm to 2 feet.
.wednesday...west winds 10 to 20 knots veering northwest late.
waves calm to 2 feet.
.wednesday night...northwest winds 10 to 20 knots. waves calm to
2 feet.
.thursday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet.
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet.
.friday...east winds 5 to 15 knots. waves calm to 2 feet.
.saturday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet.
$$
(11/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/25/2026 4:01 AM America/New_York.
Valid through 8/25/2026 4:00 PM America/New_York.
fzus63 kmqt 250801
glfls
expires:202608252000;;324361
open lake forecast for lake superior
national weather service marquette mi
400 am edt tue aug 25 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...
30.1 inch high pressure over the western great lakes this morning
shifts east into the lower great lakes by tonight. meanwhile, a 29.7
inch clipper low over manitoba moves into western ontario this
afternoon. this clipper moves over lake superior tonight and
wednesday morning before lifting away towards james bay and northern
quebec wednesday night into thursday morning. 30.1 inch high
pressure ridging returns to lake superior by thursday afternoon,
building to 30.2 inches over the lake by friday before shifting into
the lower great lakes by saturday morning.
lsz263-252000-
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-
400 am edt tue aug 25 2026
.early this morning...south winds 5 to 15 knots. waves calm to
2 feet.
.today...south winds 5 to 15 knots backing southeast late. a
slight chance of showers through early afternoon, then showers
likely and a chance of thunderstorms by mid afternoon. waves calm
to 2 feet.
.tonight...southeast winds 10 to 20 knots veering southwest after
midnight, then veering west late. a chance of showers and
thunderstorms. waves calm to 2 feet.
.wednesday...west winds 15 to 25 knots diminishing to 10 to
20 knots late. a slight chance of showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.wednesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of showers through
midnight. waves calm to 2 feet.
.thursday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet.
.thursday night...northeast winds 5 to 15 knots becoming
northwest less than 10 knots after midnight. waves calm to
2 feet.
.friday...south winds 5 to 15 knots. waves calm to 2 feet.
.saturday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet.
$$
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