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(1/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/6/2026 3:04 PM America/New_York.
Valid through 8/6/2026 11:15 PM America/New_York.
fzus63 kdtx 061904
glflh
expires:202608070315;;729119
open lake forecast for lake huron
national weather service detroit/pontiac mi
304 pm edt thu aug 6 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...periods of unsettled weather will continue to be
possible over the next few days. another round of showers and
thunderstorms is possible this afternoon and evening as a cold
front slowly drifts across the great lakes. brief period of high
pressure, 30.00 inches, fills in overnight ahead of the next cold
front which tracks through this weekend.
lhz361-070315-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
304 pm edt thu aug 6 2026
.tonight...light and variable winds becoming southeast 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.friday...south winds 5 to 10 knots backing to the east late in
the afternoon. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. a chance of showers. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots becoming west 10 to
15 knots in the late morning and afternoon. a chance of showers
in the morning. waves 1 to 3 feet.
.saturday night...west winds 10 to 15 knots early in the evening
becoming light and variable...then becoming southwest 5 to
10 knots after midnight. waves 2 feet or less.
.sunday...southwest winds 5 to 10 knots veering to the west late
in the afternoon...then becoming light and variable late in the
evening. a chance of showers. a chance of thunderstorms late in
the morning. waves 2 feet or less.
.monday...light and variable winds becoming southwest 5 to
10 knots . a chance of showers. waves 2 feet or less.
.tuesday...northwest winds 5 to 10 knots backing to the west .
waves 2 feet or less.
$$
(2/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/6/2026 3:04 PM America/New_York.
Valid through 8/6/2026 11:15 PM America/New_York.
fzus63 kdtx 061904
glflh
expires:202608070315;;729120
open lake forecast for lake huron
national weather service detroit/pontiac mi
304 pm edt thu aug 6 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...periods of unsettled weather will continue to be
possible over the next few days. another round of showers and
thunderstorms is possible this afternoon and evening as a cold
front slowly drifts across the great lakes. brief period of high
pressure, 30.00 inches, fills in overnight ahead of the next cold
front which tracks through this weekend.
lhz362-363-070315-
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-
304 pm edt thu aug 6 2026
.tonight...light and variable winds becoming southeast 5 to
10 knots after midnight. waves 2 feet or less.
.friday...southeast winds 5 to 10 knots. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots by midnight...then decreasing to 5 to 10 knots
after midnight. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots. a chance of showers in
the morning. waves 1 to 3 feet.
.saturday night...north winds 5 to 10 knots backing to the west
after midnight. waves 1 to 3 feet.
.sunday...southwest winds 5 to 10 knots in the morning becoming
south 10 to 15 knots...then decreasing to 5 to 10 knots late in
the afternoon becoming light and variable. a chance of showers
late in the morning. waves 1 to 3 feet.
.monday...light and variable winds becoming southeast 5 to
10 knots . a chance of showers and thunderstorms. waves 2 feet or
less.
.tuesday...northwest winds 5 to 10 knots becoming northwest by
midnight. waves 2 feet or less.
$$
(3/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 8/6/2026 3:04 PM America/New_York.
Valid through 8/6/2026 11:15 PM America/New_York.
fzus63 kdtx 061904
glflh
expires:202608070315;;729121
open lake forecast for lake huron
national weather service detroit/pontiac mi
304 pm edt thu aug 6 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...periods of unsettled weather will continue to be
possible over the next few days. another round of showers and
thunderstorms is possible this afternoon and evening as a cold
front slowly drifts across the great lakes. brief period of high
pressure, 30.00 inches, fills in overnight ahead of the next cold
front which tracks through this weekend.
lhz462>464-070315-
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-
304 pm edt thu aug 6 2026
.tonight...light and variable winds. waves 2 feet or less.
.friday...southeast winds 5 to 10 knots. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. a chance of showers. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots. a chance of showers.
waves 1 to 3 feet.
.saturday night...west winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less.
.sunday...southwest winds 5 to 10 knots increasing to 10 to
15 knots late in the morning...then becoming south 5 to 10 knots
late in the afternoon. a chance of showers late in the afternoon.
waves 2 feet or less.
.monday...southwest winds 5 to 10 knots. a chance of showers
early in the morning. a chance of thunderstorms. rain showers
likely . waves 2 feet or less.
.tuesday...west winds 5 to 10 knots veering to the northwest
early in the evening...then becoming light and variable by
midnight. a chance of showers early in the morning. waves 2 feet
or less.
$$
(4/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/6/2026 2:52 PM US/Central.
Valid through 8/6/2026 10:30 PM US/Central.
fzus63 kmkx 061952
glflm
expires:202608070330;;730862
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 pm cdt thu aug 6 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...
light southerly winds will develop tonight and increase by friday
afternoon as the a low pressure trough of 29.8 inches reaches
lake superior. scattered showers and storms are possible friday
night as the crosses lake michigan . west to northwest winds
behind the front early saturday will quickly return to southerly
by saturday evening ahead of the next approaching low pressure
system. an unsettled weather pattern will set up over the upper
great lakes next week where weak waves of low pressure will cross
the region and produce rounds of thunderstorms at times.
lmz261-362-364-366-563-565-567-868-070330-
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-
252 pm cdt thu aug 6 2026
sheboygan wi to pentwater mi north...
.tonight...southeast winds 5 to 10 kt becoming south. waves 1 ft
or less.
.friday...south winds 10 to 15 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft.
.friday night...south winds 15 to 25 kt becoming west 10 to
20 kt. chance of showers. waves 2 to 4 ft subsiding to 1 to 3 ft.
.saturday...northwest winds 10 to 20 kt becoming west. waves 1 to
3 ft.
.saturday night...southwest winds 10 to 20 kt diminishing to
10 to 15 kt. waves 1 to 2 ft.
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft.
.sunday night...south winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 1 to 3 ft.
.monday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
chance of showers and thunderstorms. waves 1 to 3 ft.
.tuesday...north winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft.
$$
(5/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 8/6/2026 2:52 PM US/Central.
Valid through 8/6/2026 10:30 PM US/Central.
fzus63 kmkx 061952
glflm
expires:202608070330;;730863
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 pm cdt thu aug 6 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...
light southerly winds will develop tonight and increase by friday
afternoon as the a low pressure trough of 29.8 inches reaches
lake superior. scattered showers and storms are possible friday
night as the crosses lake michigan . west to northwest winds
behind the front early saturday will quickly return to southerly
by saturday evening ahead of the next approaching low pressure
system. an unsettled weather pattern will set up over the upper
great lakes next week where weak waves of low pressure will cross
the region and produce rounds of thunderstorms at times.
lmz080-669-671-673-675-777-779-870-872-874-876-878-070330-
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-
252 pm cdt thu aug 6 2026
sheboygan wi to pentwater mi south...
.tonight...southeast winds 5 to 10 kt becoming south. waves 1 ft
or less.
.friday...southwest winds 5 to 10 kt becoming south 15 to 25 kt.
waves 1 to 2 ft building to 2 to 4 ft.
.friday night...south winds 10 to 20 kt becoming west. waves 2 to
4 ft.
.saturday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft.
.saturday night...south winds 10 to 15 kt. waves 1 to 3 ft.
.sunday...south winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 1 to 3 ft.
.sunday night...south winds 10 to 20 kt becoming southwest 10 to
15 kt. chance of showers and thunderstorms. waves 1 to 3 ft.
.monday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
showers likely with a chance of thunderstorms. waves 2 to 4 ft.
.tuesday...northwest winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 3 ft.
$$
(6/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731108
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz162-070800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu aug 6 2026 /301 pm cdt thu aug 6 2026/
.late this afternoon...south winds 15 to 25 knots. waves 1 to
3 feet.
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.friday...southwest winds 10 to 20 knots veering west late. a
chance of showers and thunderstorms. waves subsiding to calm to
2 feet.
.friday night...west winds 10 to 20 knots veering northwest after
midnight, then backing west late. waves calm to 2 feet.
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet.
.saturday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet.
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet.
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet.
.monday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet.
.tuesday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet.
$$
(7/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731109
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz263-070800-
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 thu aug 6 2026
.late this afternoon...south winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.friday...southwest winds 10 to 20 knots becoming west 5 to
15 knots late. a chance of showers and thunderstorms. waves
subsiding to calm to 2 feet.
.friday night...west winds 5 to 15 knots veering northwest after
midnight, then backing west late. waves calm to 2 feet.
.saturday...west winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet.
.saturday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. waves subsiding to calm to 2 feet.
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet.
.sunday night...south winds 5 to 15 knots becoming west less than
10 knots after midnight. waves calm to 2 feet.
.monday...west winds 5 to 15 knots. waves calm to 2 feet.
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet.
$$
(8/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731110
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz264-070800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu aug 6 2026
.late this afternoon...south winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.friday...southwest winds 10 to 20 knots becoming south 5 to
15 knots in the afternoon. a chance of showers and thunderstorms.
waves subsiding to calm to 2 feet.
.friday night...west winds 5 to 15 knots veering northwest after
midnight, then backing west late. a slight chance of showers and
thunderstorms through midnight. waves calm to 2 feet.
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet.
.saturday night...southwest winds 5 to 15 knots veering west
after midnight. waves subsiding to calm to 2 feet.
.sunday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet.
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet.
.monday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet.
.tuesday...west winds 5 to 15 knots. waves calm to 2 feet.
$$
(9/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731111
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz265-070800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu aug 6 2026
.late this afternoon...southeast winds 10 to 20 knots. waves calm
to 2 feet.
.tonight...south winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.friday...south winds 10 to 20 knots backing east late. showers
likely and a chance of thunderstorms by mid afternoon. waves calm
to 2 feet.
.friday night...southwest winds 10 to 20 knots veering west after
midnight, then increasing to 15 to 25 knots late. a chance of
thunderstorms and a slight chance of showers through midnight.
waves calm to 2 feet.
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.saturday night...southwest winds 10 to 20 knots. waves calm to
2 feet.
.sunday...west winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.sunday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet.
.monday...northeast winds 5 to 15 knots backing west. waves calm
to 2 feet.
.tuesday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet.
$$
(10/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731112
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz266-070800-
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 thu aug 6 2026
.late this afternoon...southeast winds 10 to 20 knots. waves calm
to 2 feet.
.tonight...south winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.friday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing southeast late. a chance
of showers and thunderstorms by mid afternoon. waves subsiding to
calm to 2 feet.
.friday night...southwest winds 10 to 20 knots veering northwest
late. showers likely and a chance of thunderstorms through
midnight, then a slight chance of showers after midnight. waves
calm to 2 feet.
.saturday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.saturday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves calm to 2 feet.
.sunday night...south winds 5 to 15 knots. waves calm to 2 feet.
.monday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet.
.tuesday...west winds 5 to 15 knots. waves calm to 2 feet.
$$
(11/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 8/6/2026 4:01 PM America/New_York.
Valid through 8/7/2026 4:00 AM America/New_York.
fzus63 kmqt 062001
glfls
expires:202608070800;;731113
open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu aug 6 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 30.1 inch high over the upper great lakes today keeps 30.0 inch
ridging over lake superior until tonight as the weak high travels
east towards the st. lawrence river. by friday, a cold front brings
29.8 inch troughing across the lake before 29.9 inch ridging returns
with a high digging towards the ohio river valley late friday night
into saturday. while some weak 29.8 inch troughing could be seen
over lake superior saturday night, weak 29.9 inch ridging settles
once again over the lake sunday and monday, with a weak 29.8 inch
trough potentially passing through sunday evening. the high pressure
ridging could increase to 30.0 inches by tuesday.
lsz267-070800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu aug 6 2026
.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet.
.tonight...south winds 10 to 20 knots. waves building to 1 to
3 feet.
.friday...south winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet.
.friday night...south winds 10 to 20 knots veering west late.
showers through midnight. a chance of thunderstorms. a chance of
showers after midnight. waves calm to 2 feet.
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.saturday night...southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet.
.sunday...southwest winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. waves calm to 2 feet.
.sunday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet.
.monday...south winds 5 to 15 knots veering northwest. waves calm
to 2 feet.
.tuesday...west winds 5 to 15 knots. waves calm to 2 feet.
$$
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