908
FZUS63 KMQT 081501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Mon Dec 8 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 over the Great Lakes today will shift east to
Upstate New York this evening as a 29.8 inch low over the Canadian
Prairie deepens to 29.6 inches while moving over Lake Superior by
Tuesday morning. A stronger 29.3 inch low moving out of the Canadian
Rockies will cross Lake Michigan at 29.2 inches Tuesday night,
resulting in 29.4 inch troughing over LAke Superior into Wednesday.
The low will move into New England at 29.2 inches by Thursday
morning, allowing 30.5 inch high pressure to rebuild over the
Northern Plains through Friday and shift east towards the Great
Lakes during the weekend.


LSZ162-082100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Mon Dec 8 2025 /900 AM CST Mon Dec 8 2025/

.REST OF TODAY...Southwest winds 10 to 20 knots increasing to
15 to 25 knots 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...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then becoming northwest 10 to 20 knots
late. Snow showers in the evening, then a chance of snow showers
after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by late morning, then backing south by mid afternoon. A
chance of snow showers in the afternoon. 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 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. Waves
subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves building to 1 to 3 feet.
.FRIDAY...Northwest gales to 35 knots. A chance of snow showers.
Waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-082100-
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 Mon Dec 8 2025

.REST OF TODAY...Southwest winds 5 to 15 knots increasing to
15 to 25 knots. A slight chance of snow showers. Waves 1 to
3 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...South winds 15 to 25 knots becoming southwest 10 to
20 knots by midnight, then veering west late. Snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Northeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. A chance of snow showers.
Freezing spray after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...North gales to 35 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves building to 8 to 11 feet
occasionally to 14 feet, then 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 gales to 40 knots. Freezing spray. A chance
of snow showers. Waves building to 5 to 9 feet occasionally to
11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-082100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Mon Dec 8 2025

.REST OF TODAY...Southwest winds 10 to 20 knots. A slight chance
of snow showers. Waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A chance of snow showers in the evening,
then snow showers after midnight. Waves 3 to 5 feet occasionally
to 7 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then veering north by mid afternoon. A
chance of snow showers. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. A chance of snow showers.
Freezing spray after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY...North gales to 35 knots becoming northwest 15 to
25 knots in the afternoon. Freezing spray. A slight chance of
snow showers. 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 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Northwest gales to 40 knots. Freezing spray. A chance
of snow showers. Waves building to 8 to 11 feet occasionally to
14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-082100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Mon Dec 8 2025

.REST OF TODAY...Southwest winds 10 to 20 knots increasing to
15 to 25 knots. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots late. A chance of snow showers in the evening, then snow
showers after midnight. Waves building to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
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. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 25 knots backing west. A chance
of snow showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.FRIDAY...Northwest gales to 45 knots. Freezing spray. Snow
showers likely. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 8 to 11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-082100-
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 Mon Dec 8 2025

.REST OF TODAY...Southwest winds 10 to 20 knots increasing to
20 to 30 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots. 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 veering northwest by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Snow showers in the morning, then a chance of snow showers in the
afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northeast winds 10 to 20 knots increasing to
gales to 35 knots after midnight. Snow showers in the evening,
then a chance of snow showers after midnight. Waves 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 7 to 10 feet
occasionally to 13 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots. Snow showers
likely in the evening. A chance of snow showers after midnight.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northwest winds 15 to 25 knots. A chance of snow
showers, then snow showers likely. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest gales to 40 knots veering north. Freezing
spray. Snow showers. Waves building to 11 to 15 feet occasionally
to 19 feet, then subsiding to 10 to 14 feet occasionally to
18 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-082100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Mon Dec 8 2025

.REST OF TODAY...West winds 10 to 20 knots becoming southwest
15 to 25 knots by late morning, then increasing to 20 to 30 knots
by mid afternoon. A slight chance of snow showers late in the
morning. Waves 2 to 4 feet building to 3 to 6 feet occasionally
to 8 feet.
.TONIGHT...Southwest winds 20 to 30 knots backing south by
midnight, then veering southwest late. A chance of snow showers
in the evening, then snow showers after midnight. Waves building
to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...Southwest winds 15 to 25 knots veering west. Snow
showers in the morning, then a chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots becoming
northeast 15 to 25 knots after midnight. Snow showers likely.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...North winds 20 to 30 knots. A chance of snow
showers. Waves building 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. 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 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 20 to 30 knots veering north. Snow
showers. Freezing spray. Waves building to 8 to 12 feet
occasionally to 15 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-082100-
MAFOR 0816/
Superior West 11520 11530 13537 11627 11727 11720. Waves 2 to 4
feet this afternoon. Waves 3 to 5 feet tonight. Waves 2 to 4 feet
subsiding to 1 to 3 feet Tuesday morning.

Superior North Central 11520 13530 11537 11527 11627 11720. Waves
1 to 3 feet building to 3 to 5 feet this afternoon. Waves 3 to 5
feet tonight. Waves 2 to 4 feet Tuesday morning.

Superior South Central 11520 12530 11540 11447 11537 11627 11620.
Waves 1 to 2 feet building to 2 to 4 feet this afternoon. Waves 3
to 6 feet tonight. Waves 2 to 4 feet Tuesday morning.

Superior East 12530 12540 12547 11537 11637. Waves 3 to 5 feet
this afternoon. Waves 5 to 9 feet tonight. Waves 5 to 7 feet
subsiding to 3 to 5 feet Tuesday 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