298
FZUS63 KMQT 260200
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Sun Oct 25 2026

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...

30.7 inch high pressure over the Canadian Prairies extends 30.4 inch
ridging over the Upper Great Lakes tonight. High pressure becomes
centered over northern Ontario at 30.5 inches on Monday, shifting to
the Saint Lawrence Seaway on Tuesday. A 29.8 inch low tracks from
the Northern Plains Tuesday night to James Bay at 29.6 inches by
Thursday morning, dragging a 29.9 inch trough across Lake Superior
Wednesday evening to Thursday morning. High pressure of 30.2 to 30.3
inches returns to the Upper Great Lakes by Friday.



LSZ162-260800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Sun Oct 25 2026 /900 PM CDT Sun Oct 25 2026/

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering east late. Waves calm to
2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots increasing to 15 to
25 knots. A chance of rain showers after midnight. Waves building
to 2 to 4 feet.
.TUESDAY...East winds 15 to 25 knots. Rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots becoming south 5 to
15 knots after midnight. A chance of showers. Waves subsiding to
1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...West winds 10 to 20 knots. A chance of
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ263-260800-
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 PM EDT Sun Oct 25 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves 1 to 3 feet building to 2 to
4 feet.
.MONDAY...North winds 5 to 15 knots veering northeast in the
afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots late. A chance of rain showers after midnight. Waves
building to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers through early
afternoon, then rain showers likely by mid afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. A chance of showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet.
.THURSDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing east. Waves calm to
2 feet.

$$

LSZ264-260800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Sun Oct 25 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves 2 to 4 feet.
.MONDAY...North winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots veering east late.
Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots. A chance of rain
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of showers through
midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet.
.THURSDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.

$$

LSZ265-260800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Sun Oct 25 2026

.REST OF TONIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves 1 to 3 feet building to 2 to 4 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots veering east after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A slight chance of showers through
midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-260800-
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 PM EDT Sun Oct 25 2026

.REST OF TONIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering east late.
Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. A slight chance of showers through midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of showers. Waves subsiding
to 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of showers through midnight, then
showers likely after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing south. Waves calm to
2 feet.

$$

LSZ267-260800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Sun Oct 25 2026

.REST OF TONIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then veering north late. Waves
2 to 4 feet building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots veering east after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...South winds 20 to 30 knots. A chance of showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of showers through midnight, then
showers likely after midnight. Waves 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots backing southeast. Waves calm
to 2 feet.

$$

LSZ261-260800-
MAFOR 2603/
Superior West 11710 12820 13110 11200 11210. Waves 1 to 3 feet.

Superior North Central 11720 12820 12810 13800. Waves 3 to 5 feet
overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet Monday.
Waves 1 to 2 feet Monday evening.

Superior South Central 11720 12830 11820 14810. Waves 2 to 4 feet
building to 3 to 5 feet overnight. Waves 3 to 5 feet subsiding to
2 to 4 feet Monday. Waves 1 to 3 feet Monday evening.

Superior East 11720 14820 13810. Waves 3 to 5 feet overnight.
Waves 3 to 5 feet subsiding to 2 to 4 feet Monday. Waves 1 to 2
feet Monday evening.

$$

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