(1/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/21/2026 3:35 PM America/New_York.
Valid through 6/21/2026 11:45 PM America/New_York.
fzus63 kdtx 211935
glflh
expires:202606220345;;141992
open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm edt sun jun 21 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 compact low pressure system, 29.60 inches, move east
across the ohio valley tonight into tomorrow morning. this will
bring active weather across the southern great lakes. high
pressure, 30.20 inches, will then build in tomorrow night into
tuesday, keeping winds light.
lhz361-220345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
335 pm edt sun jun 21 2026
.tonight...light and variable winds. waves 2 feet or less.
.monday...north winds 5 to 10 knots backing to the west in the
afternoon. waves 2 feet or less.
.monday night...northwest winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet in the late evening and overnight.
.tuesday...northwest winds 5 to 10 knots backing to the west
early in the afternoon. waves 2 feet or less.
.tuesday night...west winds 5 to 10 knots becoming light and
variable. waves 2 feet or less.
.wednesday...light and variable winds becoming southeast 5 to
10 knots. a chance of showers. waves 2 feet or less.
.thursday...east winds 5 to 10 knots backing to the northeast
early in the evening...then backing to the northwest by midnight.
a chance of showers. a chance of thunderstorms until early
evening. waves 2 feet or less.
.friday...west winds 5 to 10 knots. waves 2 feet or less.
$$
(2/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/21/2026 3:35 PM America/New_York.
Valid through 6/21/2026 11:45 PM America/New_York.
fzus63 kdtx 211935
glflh
expires:202606220345;;141993
open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm edt sun jun 21 2026
for waters beyond five nautical miles off shore on lake huron
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a compact low pressure system, 29.60 inches, move east
across the ohio valley tonight into tomorrow morning. this will
bring active weather across the southern great lakes. high
pressure, 30.20 inches, will then build in tomorrow night into
tuesday, keeping winds light.
lhz362-363-220345-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
335 pm edt sun jun 21 2026
.tonight...light and variable winds. waves 2 feet or less.
.monday...light and variable winds becoming north 5 to 10 knots
in the afternoon. waves 2 feet or less.
.monday night...north winds 5 to 10 knots becoming northwest
10 to 15 knots in the late evening and overnight. waves 1 to
3 feet building to 2 to 4 feet in the late evening and overnight.
.tuesday...northwest winds 5 to 10 knots. waves 1 to 3 feet.
.tuesday night...light and variable winds. waves 2 feet or less.
.wednesday...light and variable winds becoming southeast 5 to
10 knots late in the afternoon. a chance of showers. waves 2 feet
or less.
.thursday...southeast winds 5 to 10 knots. a chance of showers.
waves 2 feet or less.
.friday...west winds 5 to 10 knots until afternoon becoming light
and variable. waves 2 feet or less.
$$
(3/11)
Latest Great Lakes Marine Forecast by KDTX
Issued 6/21/2026 3:35 PM America/New_York.
Valid through 6/21/2026 11:45 PM America/New_York.
fzus63 kdtx 211935
glflh
expires:202606220345;;141994
open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm edt sun jun 21 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 compact low pressure system, 29.60 inches, move east
across the ohio valley tonight into tomorrow morning. this will
bring active weather across the southern great lakes. high
pressure, 30.20 inches, will then build in tomorrow night into
tuesday, keeping winds light.
lhz462>464-220345-
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-
335 pm edt sun jun 21 2026
.tonight...east winds 5 to 10 knots. a chance of showers after
midnight. waves 2 feet or less.
.monday...east winds 5 to 10 knots backing to the northeast early
in the afternoon...then becoming northeast 5 to 10 knots late in
the afternoon. a chance of showers in the morning. waves 1 to
3 feet.
.monday night...north winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight.
.tuesday...north winds 5 to 10 knots. waves 1 to 3 feet.
.tuesday night...light and variable winds. waves 2 feet or less.
.wednesday...light and variable winds becoming east 5 to 10 knots
late in the afternoon. a chance of showers late in the afternoon.
rain showers likely late in the evening. waves 2 feet or less.
.thursday...southeast winds 5 to 10 knots backing to the
northeast by midnight. showers likely early in the morning. a
chance of thunderstorms until early evening. a chance of showers
. waves 2 feet or less.
.friday...west winds 5 to 10 knots until afternoon becoming light
and variable. waves 2 feet or less.
$$
(4/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 6/21/2026 2:00 PM US/Central.
Valid through 6/21/2026 10:30 PM US/Central.
fzus63 kmkx 211900
glflm
expires:202606220330;;140652
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
200 pm cdt sun jun 21 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 29.7 inches will track eastward from northeast
missouri to ohio by monday. this will bring light easterly winds
through the afternoon becoming breezy northeast to north winds
over the southern portion of the lake tonight and monday. lighter
northerly winds return late monday evening into tuesday as high
pressure around 30.1 inches builds into the region.
lmz080-669-671-673-675-777-779-870-872-874-876-878-220330-
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-
200 pm cdt sun jun 21 2026
sheboygan wi to pentwater mi south...
.tonight...east winds 20 to 30 kt becoming northeast. showers
this evening, then showers likely overnight. waves 2 to 4 ft
building to 4 to 6 ft occasionally to 8 ft.
.monday...northeast winds 20 to 30 kt becoming north. waves 4 to
7 ft occasionally to 9 ft.
.monday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.tuesday...north winds 10 to 20 kt. waves 1 to 3 ft.
.tuesday night...northeast winds 10 to 15 kt veering to
southwest. waves 1 to 2 ft.
.wednesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 3 ft.
.wednesday night...south winds 10 to 15 kt becoming southwest
5 to 10 kt. chance of showers and thunderstorms. waves 1 to 2 ft.
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft.
.friday...northwest winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 ft or less.
$$
(5/11)
Latest Great Lakes Marine Forecast by KMKX
Issued 6/21/2026 2:00 PM US/Central.
Valid through 6/21/2026 10:30 PM US/Central.
fzus63 kmkx 211900
glflm
expires:202606220330;;140651
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
200 pm cdt sun jun 21 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 29.7 inches will track eastward from northeast
missouri to ohio by monday. this will bring light easterly winds
through the afternoon becoming breezy northeast to north winds
over the southern portion of the lake tonight and monday. lighter
northerly winds return late monday evening into tuesday as high
pressure around 30.1 inches builds into the region.
lmz261-362-364-366-563-565-567-868-220330-
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-
200 pm cdt sun jun 21 2026
sheboygan wi to pentwater mi north...
.tonight...northeast winds 5 to 10 kt increasing to 10 to 15 kt
after midnight, then becoming north 10 to 20 kt late. waves 1 to
3 ft.
.monday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft.
.monday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 2 ft.
.tuesday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.
.tuesday night...north winds 5 to 10 kt veering to southeast.
waves 1 ft or less.
.wednesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. waves 1 to 3 ft.
.wednesday night...southeast winds 10 to 15 kt becoming south.
chance of showers and thunderstorms. waves 1 to 2 ft.
.thursday...northwest winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft.
.friday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 ft or less.
$$
(6/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142801
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 2026
for waters beyond 5 nautical miles of shore on lake superior.
waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.
.synopsis...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz266-220800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt sun jun 21 2026
.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet.
.tonight...north winds 5 to 15 knots backing northwest after
midnight. waves calm to 2 feet.
.monday...northwest winds 10 to 20 knots. waves calm to 2 feet.
.monday night...northwest winds 5 to 15 knots. waves calm to
2 feet.
.tuesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet.
.tuesday night...southeast winds 5 to 15 knots. a chance of rain
showers after midnight. waves calm to 2 feet.
.wednesday...southeast winds 5 to 15 knots backing east by mid
afternoon. a chance of showers. waves calm to 2 feet.
.wednesday night...east winds 5 to 15 knots. waves calm to
2 feet.
.thursday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet.
.friday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet.
$$
(7/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142802
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 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...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz267-220800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sun jun 21 2026
.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet.
.tonight...north winds 5 to 15 knots backing northwest after
midnight. waves calm to 2 feet.
.monday...northwest winds 10 to 20 knots. waves calm to 2 feet.
.monday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet.
.tuesday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet.
.tuesday night...northwest winds 5 to 15 knots becoming southeast
less than 10 knots after midnight. waves calm to 2 feet.
.wednesday...east winds 5 to 15 knots. a chance of rain showers.
waves calm to 2 feet.
.wednesday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of showers and thunderstorms.
waves calm to 2 feet.
.thursday...east winds 5 to 15 knots backing northwest. waves
calm to 2 feet.
.friday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet.
$$
(8/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142797
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 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...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz162-220800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun jun 21 2026 /301 pm cdt sun jun 21 2026/
.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet.
.tonight...northeast winds 5 to 15 knots backing north late.
waves calm to 2 feet.
.monday...north winds 5 to 15 knots backing southwest in the
afternoon, then veering north late. waves calm to 2 feet.
.monday night...north winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet.
.tuesday...north winds 5 to 15 knots veering northeast by mid
afternoon. a chance of rain showers by mid afternoon. waves calm
to 2 feet.
.tuesday night...northeast winds 5 to 15 knots. a chance of rain
showers through midnight. rain showers after midnight. waves calm
to 2 feet.
.wednesday...northeast winds 10 to 20 knots. a chance of rain
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet.
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet.
.thursday...north winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet.
.friday...north winds less than 10 knots. waves calm to 2 feet.
$$
(9/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142798
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 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...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz263-220800-
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 sun jun 21 2026
.late this afternoon...northeast winds less than 10 knots. waves
calm to 2 feet.
.tonight...northeast winds less than 10 knots backing north late.
waves calm to 2 feet.
.monday...north winds less than 10 knots becoming west 5 to
15 knots in the afternoon. waves calm to 2 feet.
.monday night...west winds 5 to 15 knots diminishing to less than
10 knots after midnight, then backing southwest late. waves calm
to 2 feet.
.tuesday...southwest winds less than 10 knots becoming northeast
5 to 15 knots by mid afternoon. a slight chance of rain showers
by mid afternoon. waves calm to 2 feet.
.tuesday night...east winds 5 to 15 knots. a chance of rain
showers through midnight, then rain showers likely after
midnight. waves calm to 2 feet.
.wednesday...east winds 5 to 15 knots backing northeast by mid
afternoon. a chance of rain showers. waves calm to 2 feet.
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet.
.thursday...north winds 5 to 15 knots becoming west less than
10 knots. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots becoming east less than
10 knots. waves calm to 2 feet.
$$
(10/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142799
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 2026
for waters beyond 5 nautical miles of shore on lake superior.
waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.
.synopsis...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz264-220800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sun jun 21 2026
.late this afternoon...north winds less than 10 knots. waves calm
to 2 feet.
.tonight...northwest winds less than 10 knots increasing to 5 to
15 knots late. waves calm to 2 feet.
.monday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet.
.monday night...west winds 5 to 15 knots. waves calm to 2 feet.
.tuesday...west winds less than 10 knots backing southwest by mid
afternoon. waves calm to 2 feet.
.tuesday night...southeast winds 5 to 15 knots. a chance of rain
showers after midnight. waves calm to 2 feet.
.wednesday...east winds 5 to 15 knots. a chance of rain showers.
waves calm to 2 feet.
.wednesday night...east winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. waves calm to 2 feet.
.thursday...north winds less than 10 knots becoming northwest
5 to 15 knots. waves calm to 2 feet.
.friday...west winds 5 to 15 knots becoming southwest less than
10 knots. waves calm to 2 feet.
$$
(11/11)
Latest Great Lakes Marine Forecast by KMQT
Issued 6/21/2026 4:01 PM America/New_York.
Valid through 6/22/2026 4:00 AM America/New_York.
fzus63 kmqt 212001
glfls
expires:202606220800;;142800
open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun jun 21 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...
high pressure builds over lake superior tonight into early tuesday
morning to 30.2 inches and remains in place through the day.
pressure decreases beginning wednesday morning, falling to 29.9
inches by thursday morning. broad 30.0 inch high pressure fills in
over the upper great lakes for friday.
lsz265-220800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sun jun 21 2026
.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet.
.tonight...northeast winds 5 to 15 knots backing northwest late.
waves calm to 2 feet.
.monday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.monday night...northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming west 5 to 15 knots late.
waves calm to 2 feet.
.tuesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet.
.tuesday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet.
.wednesday...southeast winds 10 to 20 knots backing east by mid
afternoon. showers likely through early afternoon. a chance of
thunderstorms. a chance of showers by mid afternoon. waves calm
to 2 feet.
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet.
.thursday...north winds 5 to 15 knots backing west. waves calm to
2 feet.
.friday...northwest winds 5 to 15 knots backing southeast. waves
calm to 2 feet.
$$
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