786
FZUS63 KMQT 120801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Fri Jun 12 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...

Troughing progressively weakens to 29.7 inches today through
Saturday afternoon. Weak ridging of 29.8 inches returns 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.



LSZ162-122000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EDT Fri Jun 12 2026 /300 AM CDT Fri Jun 12 2026/

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...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.
.TONIGHT...Southwest winds 10 to 20 knots increasing to 15 to
25 knots 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 1 to 3 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 1 to
3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. 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 backing northeast. Waves
calm to 2 feet.

$$

LSZ263-122000-
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 AM EDT Fri Jun 12 2026

.EARLY THIS MORNING...West winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...Southwest winds 20 to 30 knots. Waves building to 4 to
8 feet occasionally to 10 feet.
.TONIGHT...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 increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. 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
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.MONDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ264-122000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EDT Fri Jun 12 2026

.EARLY THIS MORNING...West winds 15 to 25 knots. Patchy fog. A
slight chance of showers. Waves 3 to 6 feet occasionally to
8 feet.
.TODAY...West winds 15 to 25 knots becoming southwest to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon, then diminishing to 20 to 30 knots late. A slight
chance of showers by mid afternoon. Waves building to 4 to 8 feet
occasionally to 10 feet.
.TONIGHT...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...Southwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. 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
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.

$$

LSZ265-122000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EDT Fri Jun 12 2026

.EARLY THIS MORNING...West winds 20 to 30 knots. A slight chance
of showers. Waves 2 to 4 feet.
.TODAY...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.
.TONIGHT...Southwest winds 15 to 25 knots. 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 in the afternoon. Waves building 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 2 to
4 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.MONDAY...West winds 10 to 20 knots backing southwest. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.

$$

LSZ266-122000-
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 AM EDT Fri Jun 12 2026

.EARLY THIS MORNING...West winds 20 to 30 knots. Patchy fog. A
slight chance of showers. Waves 3 to 5 feet occasionally to
7 feet.
.TODAY...West winds 15 to 25 knots. A slight chance of showers by
mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.TONIGHT...Southwest winds 15 to 25 knots increasing to 20 to
30 knots late. A slight chance of showers. Waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. A slight chance of showers. 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.
.SUNDAY...West winds 15 to 25 knots. Waves 2 to 4 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.MONDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ267-122000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EDT Fri Jun 12 2026

.EARLY THIS MORNING...West winds 20 to 30 knots. Patchy fog. A
chance of showers. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...West winds 20 to 30 knots diminishing to 10 to 20 knots
in the afternoon, then backing southwest late. Patchy dense fog
through early afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves subsiding to 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. A slight chance of thunderstorms through early afternoon. A
chance of showers. Waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.MONDAY...West winds 5 to 15 knots backing southwest. Waves
subsiding to calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing southeast. A chance
of rain showers. Waves calm to 2 feet.

$$

LSZ261-121400-
MAFOR 1209/
Superior West 12530 12540 12530 11520 11530. Waves 2 to 4 feet
building to 3 to 6 feet today. Waves 3 to 5 feet subsiding to 2
to 4 feet tonight.

Superior North Central 12630 13540 11530 12520. Waves 3 to 6 feet
building to 4 to 7 feet today. Waves 4 to 7 feet subsiding to 3
to 5 feet tonight.

Superior South Central 14630 11630 11530 12520. Waves 3 to 5 feet
subsiding to 2 to 4 feet, then building to 3 to 5 feet today.
Waves 3 to 5 feet subsiding to 1 to 3 feet tonight.

Superior East 12630 11520 11510 14520. A chance of showers early
this morning. Waves 3 to 6 feet today. Waves 3 to 5 feet
subsiding to 2 to 4 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