830
FZUS63 KMQT 172107 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
407 PM 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...
High pressure averaging 30.1 inches will build over Lake Superior
through Tuesday while a 28.8 inch low moves north through the
Canadian Maritimes. 30.2 inch ridging will continue to encompass the
Great Lakes basin Wednesday, shifting into New England by Thursday
as a 29.7 inch low develops over northern Ontario. High pressure
ridging of around 30.1 inches develops over the Northern Plains and
Upper Midwest on Friday before moving into the Great Lakes region by
Saturday.


LSZ162-180900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
407 PM EST Mon Nov 17 2025 /307 PM CST Mon Nov 17 2025/

.LATE THIS AFTERNOON...West winds less than 10 knots. Waves calm
to 2 feet.
.TONIGHT...North winds less than 10 knots becoming northeast 5 to
15 knots by midnight. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots diminishing to less than
10 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds less than 10 knots becoming
southwest 5 to 15 knots by 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 in the evening, then rain showers likely after
midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. Rain showers likely in the morning,
then a chance of rain showers in the afternoon. Waves building to
1 to 3 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. Waves
calm to 2 feet.

$$

LSZ263-180900-
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-
407 PM EST Mon Nov 17 2025

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...North winds 5 to 15 knots becoming northeast less than
10 knots late. Waves calm to 2 feet.
.TUESDAY...North winds less than 10 knots backing northwest by
mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds less than 10 knots becoming southwest
5 to 15 knots by 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 building to 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. Rain showers likely in the morning, then a chance of
rain showers in the afternoon. Waves 2 to 4 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. 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.
.SATURDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 1 to 3 feet.

$$

LSZ264-180900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
407 PM EST Mon Nov 17 2025

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...North winds 5 to 15 knots diminishing to less than
10 knots late. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds less than 10 knots backing northwest.
Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds less than 10 knots backing west
by midnight, then increasing to 5 to 15 knots late. 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 building to 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. Rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Waves building
to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. Waves
building to 1 to 3 feet.

$$

LSZ265-180900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
407 PM EST Mon Nov 17 2025

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering north late. Waves subsiding to
calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west by
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 in the afternoon. Rain showers. Waves building to 1 to
3 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots. A chance of rain
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ266-180900-
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-
407 PM EST Mon Nov 17 2025

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. A slight
chance of snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering north late. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west by
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...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Rain showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots. A chance of
rain showers. Waves building to 5 to 8 feet occasionally to
10 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers, possibly mixed with rain.
Waves subsiding to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. Waves
1 to 3 feet.

$$

LSZ267-180900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
407 PM EST Mon Nov 17 2025

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. A slight
chance of snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then veering north late. A slight chance of
snow showers. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing west late.
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 after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Southwest winds 15 to 25 knots. Rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Rain showers in the evening, then a chance of
rain showers after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. A chance of rain and snow showers. Waves subsiding to
1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering west. A chance
of rain showers. Waves 1 to 3 feet.

$$

LSZ261-180300-
MAFOR 1722/
Superior West 11700 11800 15100. Waves 1 foot or less.

Superior North Central 11720 11810 14800 12700. Waves 1 to 3 feet
tonight. Waves 1 foot or less Tuesday.

Superior South Central 11720 12710 13800 12700. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight. Waves 2 feet or less Tuesday.

Superior East 12720 11710 11810 12800 12700. Waves 3 to 5 feet
subsiding to 2 to 3 feet tonight. Waves 1 to 2 feet Tuesday.

$$

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