223
FZUS63 KMQT 102137
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
437 PM EST Wed Dec 10 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...

Troughing continues to gradually weaken to 29.8 inches over Lake
Superior this evening as a 29.2 inch low over Lake Ontario tracks to
southern Quebec at 29.1 inches by tonight. This will allow 30.2 inch
high pressure to rebuild over the Northern Plains while extending
weak ridging over Lake Superior through Thursday. Ridging breaks
down temporarily on Friday as a 29.8 inch trough drops over the lake
from northern Ontario, but ridging quickly rebuilds as 30.7 inch
high pressure over the Northern Plains extends back into the Great
Lakes this weekend.


LSZ162-110900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
437 PM EST Wed Dec 10 2025 /337 PM CST Wed Dec 10 2025/

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west by
midnight. A slight chance of snow showers after midnight. Waves
calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots in the afternoon. Snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots. Waves subsiding to
2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming southwest gales
to 35 knots. Waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-110900-
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-
437 PM EST Wed Dec 10 2025

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots becoming northwest
less than 10 knots by midnight, then becoming west 5 to 15 knots
late. A slight chance of snow showers after midnight. Waves calm
to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. Heavy freezing spray. A chance
of snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.SATURDAY...Northwest winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots becoming north
20 to 30 knots after midnight. Heavy freezing spray. Waves 4 to
7 feet occasionally to 9 feet.
.SUNDAY...Northwest winds 10 to 20 knots becoming southwest gales
to 35 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.
.MONDAY...West gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-110900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
437 PM EST Wed Dec 10 2025

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Freezing
spray. Waves 6 to 9 feet occasionally to 11 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming north 15 to
25 knots by midnight. Freezing spray. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of snow showers in the morning,
then snow showers likely in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. Heavy freezing spray. A chance
of snow showers. Waves building to 8 to 11 feet occasionally to
14 feet.
.SATURDAY...Northwest gales to 35 knots. Heavy freezing spray. A
chance of snow showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY NIGHT...North gales to 35 knots diminishing to 20 to
30 knots after midnight. Heavy freezing spray. A chance of snow
showers. Waves building to 5 to 9 feet occasionally to 11 feet.
.SUNDAY...North winds 15 to 25 knots becoming southwest gales to
35 knots. Freezing spray. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...West gales to 35 knots becoming northwest 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-110900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
437 PM EST Wed Dec 10 2025

.LATE THIS AFTERNOON...Northwest winds to 30 knots with a few
gale force gusts to 35 knots possible. Freezing spray. A slight
chance of snow showers. Waves 6 to 9 feet occasionally to
11 feet.
.TONIGHT...Northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. A slight chance of snow showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. A slight chance of snow showers in the morning. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west
late. A slight chance of snow showers. Waves subsiding to calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of snow showers in the morning,
then snow showers likely in the afternoon. Waves building to 2 to
4 feet.
.FRIDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 40 knots after midnight. Freezing spray. Snow showers.
Waves building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY...Northwest gales to 40 knots. Freezing spray. Snow
showers likely. Waves subsiding to 6 to 9 feet occasionally to
11 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Freezing spray.
Snow showers likely in the evening. A chance of snow showers
after midnight. Waves 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-110900-
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-
437 PM EST Wed Dec 10 2025

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

.LATE THIS AFTERNOON...Northwest gales to 40 knots. Freezing
spray. A chance of snow showers. Waves 7 to 11 feet occasionally
to 13 feet.
.TONIGHT...Northwest gales to 40 knots becoming north gales to
35 knots by midnight, then becoming northwest 20 to 30 knots
late. Freezing spray in the evening. A chance of snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance
of snow showers. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers. Waves building to
2 to 4 feet.
.FRIDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Freezing spray. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet.
.SATURDAY...Northwest gales to 40 knots. Freezing spray. Snow
showers. Waves building to 11 to 15 feet occasionally to 19 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet.
.SATURDAY NIGHT...North gales to 40 knots. Freezing spray. Snow
showers in the evening. A chance of snow showers after midnight.
Waves 9 to 12 feet occasionally to 15 feet.
.SUNDAY...North winds 15 to 25 knots becoming southwest 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Southwest winds 20 to 30 knots veering west. Freezing
spray. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-110900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
437 PM EST Wed Dec 10 2025

.LATE THIS AFTERNOON...Northwest winds to 30 knots with a few
gale force gusts to 40 knots possible. Freezing spray. A chance
of snow showers. Waves 6 to 9 feet occasionally to 11 feet
building to 7 to 10 feet occasionally to 13 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
40 knots possible diminishing to 20 to 30 knots late. Freezing
spray in the evening. 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.
.THURSDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance
of snow showers. Waves subsiding to calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots backing southwest in the
afternoon. A slight chance of snow showers in the morning, then
snow showers likely in the afternoon. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Snow showers. Freezing spray after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SATURDAY...Northwest winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Freezing spray. Snow showers. Waves
subsiding to 9 to 12 feet occasionally to 15 feet.
.SATURDAY NIGHT...North winds 20 to 30 knots. Freezing spray.
Snow showers in the evening. A chance of snow showers after
midnight. Waves subsiding to 7 to 10 feet occasionally to
13 feet.
.SUNDAY...North winds 15 to 25 knots becoming southwest 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Freezing spray. Snow showers likely, then a chance of
snow showers. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-110300-
MAFOR 1022/
Superior West 11730 13720 11710 11700 12600. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight. Waves 2 feet or less Thursday.

Superior North Central 11740 11840 11740 11730 12830 11720 11710.
Waves 5 to 9 feet subsiding to 4 to 7 feet tonight. Waves 3 to 6
feet subsiding to 1 to 3 feet Thursday.

Superior South Central...GALE WARNING IN EFFECT...12750 12740
12730 12720. Waves 7 to 11 feet subsiding to 5 to 8 feet tonight.
Waves 4 to 7 feet subsiding to 2 to 4 feet Thursday.

Superior East...GALE WARNING IN EFFECT...11751 12840 13830 11820
11720. A chance of snow showers this evening. Waves 6 to 9 feet
building to 9 to 12 feet, then subsiding to 5 to 8 feet tonight.
Waves 4 to 7 feet subsiding to 3 to 5 feet Thursday.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes