750
FZUS63 KMQT 241501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Wed Dec 24 2025

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 30.4 inch high pressure over the Upper Great Lakes this morning
moves over the Lower Great Lakes this evening, followed by a weak
30.1 inch trough. 30.4 inch ridging briefly builds back over Lake
Superior on Thursday as a 30.5 inch high transits Ontario. Low
pressure of 29.6 inches moves east along the southern end of the
Great Lakes Basin on Friday. A deepening low then lifts over the
Upper Great Lakes Saturday night and Sunday. By Monday, a strong
high pressure of at least 30.6 inches will have set up over the
Plains with the now 29.1 inch low moving to Quebec, yielding a tight
pressure gradient over the Great Lakes.


LSZ162-242100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Wed Dec 24 2025 /900 AM CST Wed Dec 24 2025/

.REST OF TODAY...South winds 5 to 15 knots becoming southwest
10 to 20 knots by late morning, then becoming west 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then becoming northeast 15 to 25 knots late. Waves
building to 2 to 4 feet.
.THURSDAY...Northeast winds 15 to 25 knots veering east. A chance
of snow showers, possibly mixed with freezing rain in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots. Snow showers,
possibly mixed with sleet. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. A chance of snow showers, possibly
mixed with rain in the morning. Waves subsiding to calm to
2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming west 20 to
30 knots. A chance of rain showers. A chance of snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 40 knots veering northwest. Heavy
freezing spray. A chance of snow showers. Waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-242100-
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-
1000 AM EST Wed Dec 24 2025

.REST OF TODAY...South winds 5 to 15 knots veering west by mid
afternoon. A slight chance of snow showers late in the morning.
Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...North winds 10 to 20 knots veering northeast late.
Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
slight chance of snow showers in the afternoon. Waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots. Snow showers.
Waves building to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 5 to
15 knots in the afternoon. A chance of rain showers in the
morning. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots becoming west 20 to
30 knots. A chance of rain showers, possibly mixed with snow.
Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...West gales to 45 knots becoming northwest storm force
winds to 50 knots. Heavy freezing spray. A chance of snow
showers. Waves building to 12 to 17 feet occasionally to 21 feet,
then subsiding to 10 to 14 feet occasionally to 18 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-242100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Wed Dec 24 2025

...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...South winds 5 to 15 knots veering west by mid
afternoon. A slight chance of snow showers. Waves calm to 2 feet
building to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 15 to
25 knots by midnight. Freezing spray after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon.
Freezing spray in the morning. A slight chance of snow showers in
the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast gales to 40 knots. Snow showers.
Waves building to 9 to 12 feet occasionally to 15 feet.
.FRIDAY...South gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. Snow showers likely in the morning, then a
slight chance of snow showers in the afternoon. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers, possibly mixed with snow.
Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...West gales to 45 knots becoming northwest storm force
winds to 55 knots. Heavy freezing spray. A chance of snow
showers. Waves building to 15 to 20 feet occasionally to 25 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-242100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Wed Dec 24 2025

.REST OF TODAY...South winds 10 to 20 knots veering southwest by
mid afternoon. A slight chance of snow showers late in the
morning. Waves calm to 2 feet building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.TONIGHT...West winds 15 to 25 knots veering north by midnight,
then increasing to 20 to 30 knots late. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...Northeast winds 15 to 25 knots veering east by late
morning, then increasing to 20 to 30 knots by mid afternoon.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast gales to 40 knots. Snow showers.
Waves building to 7 to 10 feet occasionally to 13 feet.
.FRIDAY...South gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. Snow showers likely in the morning, then a
chance of snow showers in the afternoon. Waves subsiding to 2 to
4 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers. A chance of snow showers.
Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...West storm force winds to 50 knots becoming northwest
storm force winds to 55 knots. Heavy freezing spray. Snow showers
likely. Waves building to 15 to 20 feet occasionally to 25 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-242100-
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-
1000 AM EST Wed Dec 24 2025

...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...South winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then veering southwest by mid
afternoon. A slight chance of snow showers. Waves calm to 2 feet
building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots becoming north 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
Freezing spray after midnight. Waves subsiding to 2 to 4 feet,
then building to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then veering east by mid afternoon.
Freezing spray in the morning. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast gales to 40 knots. A chance of snow
showers in the evening, then snow showers after midnight. Waves
building to 9 to 12 feet occasionally to 15 feet.
.FRIDAY...South gales to 40 knots diminishing to 20 to 30 knots
in the afternoon. Snow showers in the morning, then a chance of
snow showers in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots. Waves subsiding to
2 to 4 feet.
.SATURDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers, possibly mixed with snow.
Waves building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...West storm force winds to 55 knots veering northwest.
Heavy freezing spray. Snow showers. Waves building to 20 to
25 feet occasionally to 31 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-242100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Wed Dec 24 2025

...GALE WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...South winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then veering southwest by mid
afternoon. A slight chance of snow showers. Waves calm to 2 feet
building to 2 to 4 feet.
.TONIGHT...West winds 15 to 25 knots veering northwest by
midnight, then becoming north 20 to 30 knots late. Waves building
to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then veering east by mid afternoon.
Freezing spray in the morning. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. A chance of snow showers in the
evening, then snow showers after midnight. Freezing spray after
midnight. Waves building to 6 to 9 feet occasionally to 11 feet.
.FRIDAY...Southeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY...Southeast winds 20 to 30 knots veering south. A
chance of rain showers. A chance of snow showers. Rain showers
likely. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 45 knots becoming northwest storm force
winds to 50 knots. Heavy freezing spray. Snow showers. Waves
building to 20 to 25 feet occasionally to 31 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-242100-
MAFOR 2416/
Superior West 12510 11610 11820 13120 11130. Waves 1 to 2 feet
this afternoon. Waves 1 to 3 feet building to 2 to 4 feet
tonight. Waves 2 to 4 feet Thursday morning.

Superior North Central 11420 11520 11620 11730 13830 11130. Waves
1 to 3 feet this afternoon. Waves 2 to 4 feet building to 3 to 6
feet tonight. Waves 3 to 6 feet Thursday morning.

Superior South Central 11430 11530 11620 11720 13830 11130. Waves
1 to 2 feet building to 2 to 4 feet this afternoon. Waves 1 to 3
feet building to 4 to 7 feet tonight. Waves 4 to 7 feet Thursday
morning.

Superior East 11420 11530 11520 11620 11730 11840 11830 11130. A
chance of snow showers this afternoon. Waves 1 to 3 feet building
to 3 to 5 feet this afternoon. Waves 3 to 6 feet building to 4 to
7 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet
Thursday morning.

$$

WFO MQT

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes