232
FZUS63 KMQT 280801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EDT Mon Sep 28 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 30.1 inch high pressure holds over Lake Superior today. Thereafter
a 29.7 inch trough will build into the Plains with Lake Superior
remaining between the trough and high pressure over the eastern U.S.
The trough will shift to the western part of the lake by Wednesday
night as a 29.3 inch low moves from the Canadian Prairies to the
Hudson bay. Behind the trough, high pressure of 30.4 inches develops
over the Central Plains Thursday night into Friday, extending 30.2
inch ridging over the lake.



LSZ162-282000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Mon Sep 28 2026 /301 AM CDT Mon Sep 28 2026/

.EARLY THIS MORNING...North winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...Northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. Waves
calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. A slight
chance of showers after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Showers likely through midnight, then a
chance of showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. A chance of showers through
midnight. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.

$$

LSZ263-282000-
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 EDT Mon Sep 28 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming east 5 to 15 knots late.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. A slight
chance of showers after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots late. A chance of showers by mid afternoon. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots. Showers likely.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. A chance of showers. Waves
building to 1 to 3 feet.
.THURSDAY...West winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.

$$

LSZ264-282000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Mon Sep 28 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots becoming east less than
10 knots in the afternoon, then veering southeast late. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A slight chance of showers
by mid afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots. A chance of showers.
Waves 1 to 3 feet.
.WEDNESDAY...South winds 5 to 15 knots. A chance of showers.
Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.THURSDAY...West gales to 40 knots becoming northwest 20 to
30 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.

$$

LSZ265-282000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Mon Sep 28 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...North winds 5 to 15 knots veering east late. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering south late. Waves calm to
2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers
through midnight, then showers likely after midnight. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. A chance of showers. Waves
building to 1 to 3 feet.
.THURSDAY...West gales to 45 knots becoming northwest 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-282000-
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 EDT Mon Sep 28 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots diminishing to less than
10 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south after midnight,
then increasing to 10 to 20 knots late. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of showers through midnight,
then showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...South winds 20 to 30 knots. A chance of showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.THURSDAY...West gales to 40 knots becoming northwest 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-282000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Mon Sep 28 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots backing northwest in the
afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots becoming northwest less than
10 knots after midnight, then becoming south 5 to 15 knots late.
Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 2 to 4 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots. Showers likely
through midnight, then a chance of showers after midnight. Waves
subsiding to 1 to 3 feet.
.THURSDAY...West gales to 35 knots becoming northwest 15 to
25 knots. A chance of showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-281400-
MAFOR 2809/
Superior West 11800 11100 11200 12100 12200 11300. Waves 1 foot
or less.

Superior North Central 12800 11100 11200 12300 12310. Waves 1
foot or less.

Superior South Central 11700 11800 12100 11200 11300 11310 11320.
Waves 1 foot or less.

Superior East 11700 12800 12700 11800 11700 11400. Waves 1 foot
or less.

$$

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