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(1/10)
Latest Great Lakes Marine Forecast by KDTX
Issued 5/9/2026 3:38 PM America/New_York.
Valid through 5/9/2026 11:45 PM America/New_York.
fzus63 kdtx 091938
glflh
expires:202605100345;;287860
open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sat may 9 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...ongoing passage of a cold front to back winds from
west-southwest to northwest this evening. high pressure builds in
behind the front late tonight and overnight, leading to lighter
winds.
lhz361-362-100345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
338 pm edt sat may 9 2026
.tonight...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots after midnight. waves 5 to
7 feet. waves occasionally around 10 feet.
.sunday...west winds 10 to 15 knots. waves 3 to 5 feet.
.sunday night...northwest winds 10 to 15 knots. a chance of
showers in the evening. waves 3 to 5 feet.
.monday...northwest winds 10 to 15 knots becoming north 5 to
10 knots early in the afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet early in the afternoon.
.monday night...west winds 5 to 10 knots becoming light and
variable. waves 1 to 3 feet.
.tuesday...light and variable winds becoming southeast 15 to
20 knots late in the morning...then increasing to 20 to 25 knots
with gusts to around 30 knots late in the afternoon. showers
likely late in the morning. showers late in the afternoon. waves
1 to 3 feet building to 4 to 6 feet late in the afternoon. waves
occasionally around 8 feet.
.wednesday...northeast winds 15 to 20 knots backing to the north.
showers likely early in the morning...then a chance of showers
until early evening. waves 4 to 6 feet. waves occasionally around
8 feet.
.thursday...northwest winds 10 to 15 knots becoming southwest by
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet.
$$
(2/10)
Latest Great Lakes Marine Forecast by KDTX
Issued 5/9/2026 3:38 PM America/New_York.
Valid through 5/9/2026 11:45 PM America/New_York.
fzus63 kdtx 091938
glflh
expires:202605100345;;287861
open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sat may 9 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...ongoing passage of a cold front to back winds from
west-southwest to northwest this evening. high pressure builds in
behind the front late tonight and overnight, leading to lighter
winds.
lhz363-462>464-100345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
338 pm edt sat may 9 2026
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots in the late evening and overnight. waves 3 to 5 feet.
.sunday...west winds 10 to 15 knots decreasing to 5 to 10 knots
late in the morning...then veering to the west 5 to 10 knots in
the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the
afternoon.
.sunday night...north winds 5 to 10 knots. waves 1 to 3 feet
building to 3 to 5 feet after midnight.
.monday...north winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet early in the afternoon.
.monday night...light and variable winds. waves 2 feet or less.
.tuesday...light and variable winds becoming southeast 20 to
25 knots with gusts to around 30 knots. showers likely late in
the morning. showers late in the afternoon. waves 2 feet or less
building to 5 to 7 feet. waves occasionally around 10 feet.
.wednesday...southeast winds 10 to 15 knots becoming northwest
15 to 20 knots . a chance of showers. waves 4 to 6 feet.
.thursday...north winds 10 to 15 knots decreasing to 5 to
10 knots . waves 3 to 5 feet subsiding to 1 to 3 feet . waves
occasionally around 8 feet.
$$
(3/10)
Latest Great Lakes Marine Forecast by KMKX
Issued 5/9/2026 2:15 PM US/Central.
Valid through 5/9/2026 10:15 PM US/Central.
fzus63 kmkx 091915
glflm
expires:202605100315;;287541
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
215 pm cdt sat may 9 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...
low pressure around 29.5 inches east of lake superior this
afternoon will move into southern quebec tonight. its trailing
cold front will continue to move across lake michigan this
afternoon. westerly winds ahead of the front will veer west to
northwest with the frontal passage. gusty northwest winds are
expected near the western shoreline this afternoon. a backdoor
cold front will then sag southward across the lake this evening
through tonight, with a period of north to northeast winds behind
it.
high pressure around 30.3 inches is then expected to move from
southern manitoba on sunday to over lake michigan by monday
morning. relatively light and variable winds are expected during
this period. low pressure around 29.7 inches should then move east
southeast across the region tuesday, with increasing south to
southeast winds ahead of it, veering west to northwest behind it
for tuesday night into wednesday.
lmz261-362-364-366-563-565-567-868-100315-
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-
215 pm cdt sat may 9 2026
sheboygan wi to pentwater mi north...
.tonight...west winds 15 to 25 kt diminishing to 10 to 20 kt.
scattered rain showers. waves 2 to 4 ft subsiding to 1 to 3 ft.
.sunday...west winds 10 to 20 kt becoming northwest late in the
morning, then becoming west early in the afternoon becoming north
late. waves 1 to 3 ft.
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft.
.monday...northwest winds 10 to 15 kt backing to south. waves
1 to 2 ft.
.monday night...south winds 10 to 15 kt. waves 1 to 2 ft.
.tuesday...south winds to 30 kt. rain showers. waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.tuesday night...south winds to 30 kt veering to northwest 15 to
25 kt. chance of rain showers. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 4 to
7 ft occasionally to 9 ft.
.thursday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft.
$$
(4/10)
Latest Great Lakes Marine Forecast by KMKX
Issued 5/9/2026 2:15 PM US/Central.
Valid through 5/9/2026 10:15 PM US/Central.
fzus63 kmkx 091915
glflm
expires:202605100315;;287542
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
215 pm cdt sat may 9 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...
low pressure around 29.5 inches east of lake superior this
afternoon will move into southern quebec tonight. its trailing
cold front will continue to move across lake michigan this
afternoon. westerly winds ahead of the front will veer west to
northwest with the frontal passage. gusty northwest winds are
expected near the western shoreline this afternoon. a backdoor
cold front will then sag southward across the lake this evening
through tonight, with a period of north to northeast winds behind
it.
high pressure around 30.3 inches is then expected to move from
southern manitoba on sunday to over lake michigan by monday
morning. relatively light and variable winds are expected during
this period. low pressure around 29.7 inches should then move east
southeast across the region tuesday, with increasing south to
southeast winds ahead of it, veering west to northwest behind it
for tuesday night into wednesday.
lmz080-669-671-673-675-777-779-870-872-874-876-878-100315-
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-
215 pm cdt sat may 9 2026
sheboygan wi to pentwater mi south...
.tonight...west winds 15 to 25 kt becoming northwest late, then
diminishing to 10 to 20 kt through early evening becoming north
10 to 15 kt late this evening becoming northeast becoming north
5 to 10 kt late. waves 2 to 4 ft subsiding to 1 to 3 ft.
.sunday...north winds 10 to 15 kt veering to east 5 to 10 kt.
waves 1 to 2 ft.
.sunday night...northeast winds 5 to 10 kt. waves 1 to 2 ft.
.monday...northeast winds 5 to 10 kt increasing to 10 to 20 kt in
the afternoon. waves 1 to 2 ft.
.monday night...east winds 10 to 15 kt becoming southeast. waves
1 to 2 ft.
.tuesday...south winds to 30 kt. rain showers. waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.tuesday night...southwest winds to 30 kt becoming west 15 to
25 kt. chance of rain showers. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft.
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft subsiding to 1 to 2 ft.
$$
(5/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288528
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat may 9 2026 /301 pm cdt sat may 9 2026/
.late this afternoon...northwest winds 15 to 25 knots. waves calm
to 2 feet.
.tonight...northwest winds 10 to 20 knots. waves calm to 2 feet.
.sunday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. waves calm to
2 feet.
.sunday night...west winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet.
.monday...southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of rain showers after midnight.
waves calm to 2 feet.
.tuesday...southeast winds 10 to 20 knots backing north by mid
afternoon. rain showers. waves building to 2 to 4 feet.
.tuesday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet.
.wednesday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves calm to 2 feet.
.thursday...east winds 5 to 15 knots becoming south 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
$$
(6/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288529
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz263-100800-
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 pm edt sat may 9 2026
.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet.
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves 1 to 3 feet.
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves subsiding to calm to 2 feet.
.sunday night...west winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. waves calm
to 2 feet.
.monday...south winds 5 to 15 knots. waves calm to 2 feet.
.monday night...southeast winds 5 to 15 knots. a chance of rain
showers after midnight. waves building to 1 to 3 feet.
.tuesday...southeast winds 10 to 20 knots. rain showers. waves
building to 2 to 4 feet.
.tuesday night...north winds 10 to 20 knots. waves subsiding to
1 to 3 feet.
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet.
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet.
$$
(7/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288530
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz264-100800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sat may 9 2026
.late this afternoon...northwest winds 10 to 20 knots. waves 1 to
3 feet.
.tonight...northwest winds 5 to 15 knots. waves 1 to 3 feet.
.sunday...northwest winds 5 to 15 knots backing west late. waves
subsiding to calm to 2 feet.
.sunday night...west winds 5 to 15 knots veering north late.
waves calm to 2 feet.
.monday...northwest winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.monday night...south winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. waves calm to 2 feet.
.tuesday...southeast winds 20 to 30 knots. rain showers likely.
waves building to 3 to 6 feet occasionally to 8 feet.
.tuesday night...northeast winds 15 to 25 knots becoming north
10 to 20 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet.
.wednesday...northwest winds 15 to 25 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet.
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet.
$$
(8/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288531
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz265-100800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sat may 9 2026
.late this afternoon...northwest winds 15 to 25 knots. waves 2 to
4 feet subsiding to 1 to 3 feet.
.tonight...west winds 15 to 25 knots veering northwest after
midnight. waves subsiding to calm to 2 feet.
.sunday...northwest winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet.
.monday...northwest winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet.
.monday night...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet.
.tuesday...southeast winds 20 to 30 knots. rain showers likely.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.tuesday night...southeast winds 15 to 25 knots becoming north
20 to 30 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet.
.wednesday...northwest gales to 35 knots becoming west 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.thursday...southeast winds 10 to 20 knots becoming south 20 to
30 knots. a chance of rain showers. waves building to 2 to
4 feet.
$$
(9/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288532
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz266-100800-
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 pm edt sat may 9 2026
.late this afternoon...northwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet.
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 2 to 4 feet.
.sunday night...northwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet.
.monday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet.
.monday night...southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet.
.tuesday...south winds 20 to 30 knots backing southeast by mid
afternoon. a chance of rain showers through early afternoon, then
rain showers likely by mid afternoon. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.tuesday night...southeast winds 15 to 25 knots becoming north
20 to 30 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.wednesday...northwest gales to 35 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.
.thursday...southeast winds 10 to 20 knots becoming south 15 to
25 knots. waves building to 2 to 4 feet.
$$
(10/10)
Latest Great Lakes Marine Forecast by KMQT
Issued 5/9/2026 4:02 PM America/New_York.
Valid through 5/10/2026 4:00 AM America/New_York.
fzus63 kmqt 092002
glfls
expires:202605100800;;288533
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat may 9 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 east of lake superior makes it to quebec this
evening. behind the low, ridging progressively builds over the lake
as a 30.2 inch high pressure over the canadian prairies builds
towards the great lakes this weekend. the high shifts southeast into
the western great lakes at 30.3 inches sunday night into monday.
ridging from the high persists at around 30.2 inches over lake
superior through monday evening. the ridging is eventually replaced
by a 29.7 inch clipper descending over western lake superior on
tuesday as the previous high pressure weakens and shifts to the east
coast. as the clipper continues towards the eastern great lakes
tuesday night into wednesday, 30.1 inch high pressure ridging moves
over lake superior. this high pressure is pressed southeast to the
lower great lakes on thursday while a 29.4 inch low emanates off the
northern rockies.
lsz267-100800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sat may 9 2026
.late this afternoon...northwest winds to 30 knots with a few
gale force gusts to 35 knots possible. waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet.
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots after
midnight. waves subsiding to 2 to 4 feet.
.sunday...northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet.
.sunday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots. waves subsiding to 1 to 3 feet.
.monday...northwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet.
.monday night...south winds less than 10 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet.
.tuesday...southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. rain showers likely by mid afternoon.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.tuesday night...southeast winds 15 to 25 knots becoming north
10 to 20 knots after midnight. a chance of rain showers. waves
subsiding to calm to 2 feet.
.wednesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.thursday...west winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet.
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