945
FZUS63 KMQT 112001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Thu Jun 11 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...

A 29.3 inch low lifts through the eastern lake this tonight. Behind
the low, troughing progressively weakens to 29.7 inches Friday
through Friday night. While troughing looks to restrengthen to 29.6
inches on Saturday, expect weak ridging of 29.8 inches to return to
Lake Superior on Sunday. A 29.7 inch trough moves through the lake
Sunday night before 29.8 inch ridging pushes back in on Monday.



LSZ162-120800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Thu Jun 11 2026 /300 PM CDT Thu Jun 11 2026/

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of showers. Waves 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming west 15 to
25 knots after midnight, then backing southwest late. A chance of
showers through midnight. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...West winds 15 to 25 knots backing southwest after
midnight. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.SATURDAY...West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 15 to 25 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots veering west. Waves calm
to 2 feet.

$$

LSZ263-120800-
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-
400 PM EDT Thu Jun 11 2026

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. A chance
of showers. Waves 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots
after midnight. Showers through midnight, then a slight chance of
showers after midnight. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Southwest winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ264-120800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Thu Jun 11 2026

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A slight
chance of showers. Waves 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots
after midnight. Showers through midnight, then a chance of
showers after midnight. Waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots becoming southwest 20 to
30 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
2 to 4 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ265-120800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Thu Jun 11 2026

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. A chance
of showers. Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots becoming west 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
A slight chance of thunderstorms through midnight. Showers. Waves
building to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A slight chance of showers by mid afternoon.
Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots. A slight chance
of showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A slight chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
1 to 3 feet.
.SUNDAY...West winds 20 to 30 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering south. Waves
calm to 2 feet.

$$

LSZ266-120800-
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-
400 PM EDT Thu Jun 11 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. A slight chance
of showers. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming northwest 15 to
25 knots after midnight, then becoming west 20 to 30 knots late.
Showers and a slight chance of thunderstorms through midnight,
then a slight chance of showers after midnight. Waves building to
3 to 5 feet occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots. A slight chance of showers
and thunderstorms by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A slight chance of showers and thunderstorms. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots. Waves subsiding to
2 to 4 feet.
.MONDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ267-120800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Thu Jun 11 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots becoming west 20 to 30 knots
after midnight. Showers and a chance of thunderstorms through
midnight, then a chance of showers after midnight. Waves building
to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 10 to 20 knots
in the afternoon. A slight chance of showers and thunderstorms by
mid afternoon. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots late. A slight chance of showers. Waves 2 to
4 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots. Waves 2 to 4 feet.
.MONDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ261-120200-
MAFOR 1121/
Superior West 12526 11520 11630 12530 12540. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet building to 3
to 6 feet Friday.

Superior North Central 11420 11526 11626 11636 12630 12540. Waves
1 to 3 feet building to 2 to 4 feet tonight. Waves 3 to 6 feet
building to 4 to 7 feet Friday.

Superior South Central 11210 11126 11736 11636 14630. Waves 1 to
2 feet building to 2 to 4 feet tonight. Waves 3 to 5 feet
subsiding to 2 to 4 feet Friday.

Superior East 12210 11136 11746 11630 11530 11520 11510. A chance
of thunderstorms overnight. Waves 1 to 2 feet building to 3 to 5
feet tonight. Waves 3 to 6 feet Friday.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes