729
FZUS63 KMQT 080301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EST Sun Dec 7 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 30.5 inch high over Minnesota slides over the Great Lakes basin
tonight into tomorrow as it weakens to 30.4 inches. By tomorrow
afternoon, a 29.7 inch low develops over North Dakota, eventually
moving over Lake Superior Tuesday morning as it deepens to 29.5
inches. A second, stronger Clipper Low forms Tuesday over the
Montana/Canada border, absorbing the previous low Tuesday night at
29.2 inches as it approaches Lake Michigan. The low lifts through
southern Ontario on Wednesday while weak 30.1 inch ridging traverses
the Plains. The low quickly ejects past the St. Lawrence Seaway on
Thursday as high pressure over the Canadian Rockies builds to 30.9
inches, eventually dropping into the Northern Plains on Friday.


LSZ162-080900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EST Sun Dec 7 2025 /901 PM CST Sun Dec 7 2025/

.REST OF TONIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots by midnight, then becoming southwest 10 to 20 knots
late. Flurries after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then veering northwest late. Snow
showers in the evening, then a chance of snow showers after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. Snow showers in the evening, then
a chance of snow showers after midnight. Freezing spray after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves building to 1 to
3 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-080900-
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-
1001 PM EST Sun Dec 7 2025

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming
southwest 10 to 20 knots late. A chance of snow showers. Waves
calm to 2 feet building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots veering west late.
Snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots becoming west 5 to
15 knots in the afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. Snow showers likely in the
evening, then a chance of snow showers after midnight. Freezing
spray after midnight. Waves building to 7 to 10 feet occasionally
to 13 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-080900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EST Sun Dec 7 2025

.REST OF TONIGHT...Northwest winds 5 to 15 knots backing west
late. A chance of snow showers after midnight. Waves 1 to 3 feet
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots backing southwest by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 15 to 25 knots. Snow showers
likely. Waves 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. A chance of snow showers. Freezing
spray after midnight. Waves subsiding to calm to 2 feet, then
building to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-080900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EST Sun Dec 7 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots backing west by
midnight. Flurries after midnight. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight, then veering west late. Snow showers.
Waves building to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming northeast
20 to 30 knots after midnight. Snow showers likely. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North gales to 35 knots becoming northwest 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Snow showers likely.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots increasing to gales to
40 knots. Snow showers. Freezing spray. Waves building to 7 to
11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-080900-
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-
1001 PM EST Sun Dec 7 2025

...GALE WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE MONDAY
NIGHT...

.REST OF TONIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots late. A chance of snow showers. Waves 3 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots. Flurries in the morning. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southwest gales to 35 knots diminishing to 20 to
30 knots by midnight. A chance of snow showers in the evening,
then snow showers after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Snow showers in the morning, then a
chance of snow showers in the afternoon. Waves subsiding to 2 to
4 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
20 to 30 knots after midnight. Snow showers. Waves subsiding to
1 to 3 feet, then building to 5 to 8 feet occasionally to
10 feet.
.WEDNESDAY...North gales to 35 knots. Freezing spray in the
morning. A chance of snow showers. Waves building to 6 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 15 to 25 knots. A chance of snow
showers, then snow showers likely. Waves subsiding to 2 to
4 feet, then building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 20 to 30 knots increasing to gales to
35 knots. Snow showers. Freezing spray. Waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-080900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EST Sun Dec 7 2025

.REST OF TONIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. A chance of snow showers. Waves 3 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots. A chance of snow showers in the morning. Waves building
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots. Snow showers.
Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...West winds 15 to 25 knots. Snow showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. Snow showers likely. Waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...North winds 20 to 30 knots. A chance of snow
showers. Waves building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots. A chance of
snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.THURSDAY...Northwest winds 15 to 25 knots veering north. A
chance of snow showers, then snow showers likely. Waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming north 20 to
30 knots. Snow showers likely. Freezing spray. Waves building to
7 to 10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-080900-
MAFOR 0804/
Superior West 11610 13520 12530 12537. Waves 2 feet or less
overnight. Waves 1 to 3 feet building to 3 to 5 feet Monday.
Waves 3 to 5 feet Monday evening.

Superior North Central 11720 11610 12620 12530 12537. Waves 1 to
3 feet overnight. Waves 1 to 3 feet building to 3 to 5 feet
Monday. Waves 3 to 6 feet Monday evening.

Superior South Central 11720 12620 12520 12530 11540. A chance of
snow showers Monday evening. Waves 2 to 4 feet overnight. Waves 1
to 3 feet Monday. Waves 3 to 6 feet Monday evening.

Superior East 12720 11620 11630 12530 12547. Waves 3 to 5 feet
subsiding to 2 to 4 feet overnight. Waves 3 to 6 feet Monday.
Waves 5 to 8 feet Monday evening.

$$

WFO MQT

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weather.gov/greatlakes