576
FZUS63 KMQT 170901
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EST Mon Nov 17 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...

This morning, 30.1 inch ridging approaches western Lake Superior
associated with a 30.2 inch high over northern Saskatchewan and
Manitoba. This high moves across northern Ontario tonight into
Tuesday, lingering over the Great Lakes basin through Wednesday
before shifting east to New England. A 29.8 inch low moving over
northern Ontario Thursday morning will pass a 29.9 inch trough over
the lake. Friday, Lake Superior will be between the low pressure
(now having moved over Quebec around 29.6 inches) and a 30.1 inch
high over the Northern Plains. This high moves over the lake
Saturday morning, maintaining 30.1 inches.


LSZ162-172100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EST Mon Nov 17 2025 /301 AM CST Mon Nov 17 2025/

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots backing west by mid afternoon.
Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast by
midnight. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering northwest.
Rain showers likely. Waves calm to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots backing west. Waves calm
to 2 feet.

$$

LSZ263-172100-
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 AM EST Mon Nov 17 2025

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots becoming east less than
10 knots by late morning, then veering west by mid afternoon.
Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds less than 10 knots increasing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming northwest
15 to 25 knots. Rain showers likely. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-172100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EST Mon Nov 17 2025

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.TUESDAY...North winds less than 10 knots backing northwest.
Waves calm to 2 feet.
.TUESDAY NIGHT...West winds less than 10 knots becoming southwest
5 to 15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. A chance of rain showers. Waves
1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming northwest
15 to 25 knots. Rain showers likely, then a chance of rain
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-172100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EST Mon Nov 17 2025

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TODAY...Northwest winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north by
midnight, then diminishing to 5 to 15 knots late. Waves subsiding
to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming west 20 to
30 knots. Rain showers, then a chance of rain showers. Waves
building to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-172100-
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 AM EST Mon Nov 17 2025

.EARLY THIS MORNING...North winds 20 to 30 knots. A slight chance
of snow showers. Waves 6 to 9 feet occasionally to 11 feet.
.TODAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A slight chance of snow showers in the
morning. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves building to 1 to 3 feet.
.THURSDAY...South winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of rain and snow showers. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 1 to
3 feet.

$$

LSZ267-172100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EST Mon Nov 17 2025

.EARLY THIS MORNING...North winds 20 to 30 knots. Waves 5 to
9 feet occasionally to 11 feet.
.TODAY...North winds 20 to 30 knots backing northwest. A slight
chance of snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots veering north by
midnight, then diminishing to 10 to 20 knots late. A slight
chance of snow showers in the evening. Waves subsiding to 1 to
3 feet.
.TUESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
rain showers. Waves building to 1 to 3 feet.
.THURSDAY...South winds 15 to 25 knots becoming southwest 20 to
30 knots. Rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots. A chance of rain
showers, possibly mixed with snow. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 1 to 3 feet.

$$

LSZ261-171500-
MAFOR 1710/
Superior West 11720 11810 11710 12600 11800 11100 11110. Waves 1
to 3 feet subsiding to 1 foot or less today. Waves 1 foot or less
tonight.

Superior North Central 12830 11730 12720 11820 11810 11800. Waves
3 to 6 feet subsiding to 2 to 4 feet today. Waves 1 to 3 feet
tonight.

Superior South Central 13730 13720 12810. Waves 5 to 8 feet
subsiding to 3 to 6 feet today. Waves 3 to 5 feet subsiding to 1
to 3 feet tonight.

Superior East 12830 13730 11720 11820 11810. Waves 5 to 9 feet
subsiding to 4 to 6 feet today. Waves 3 to 6 feet subsiding to 2
to 3 feet tonight.

$$

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