538
FZUS63 KMQT 282002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM 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 over Lake Superior this afternoon heads
toward the Lower Great Lakes tonight. Thereafter a 29.7 inch trough
builds into the Plains with Lake Superior remaining between the
trough and high pressure over the eastern U.S. The trough shifts to
the western part of the lake by Tuesday night as a 29.3 inch low
moves from the Canadian Prairies to Hudson Bay. Troughing over Lake
Superior could strengthen to 29.6 inches Wednesday night before high
pressure of 30.3 inches develops over the Central Plains Thursday
night into Friday. This high moves through the Upper Great Lakes
Friday night and Saturday.



LSZ162-290800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Mon Sep 28 2026 /301 PM CDT Mon Sep 28 2026/

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of fog.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Areas of
fog. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of showers through
early afternoon, then showers likely and a slight chance of
thunderstorms by mid afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. A chance of showers through midnight. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering
northwest after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming west 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ263-290800-
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 PM EDT Mon Sep 28 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of fog.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight, then veering south late. Areas of fog
through midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. 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 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering southwest late. Showers
likely through midnight, then a slight chance of showers after
midnight. Waves 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A slight chance of
showers. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.
.SATURDAY...South winds 10 to 20 knots becoming west 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ264-290800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Mon Sep 28 2026

.LATE THIS AFTERNOON...Southeast winds less than 10 knots. Areas
of fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south late.
Areas of fog. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A slight chance of
showers by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-290800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Mon Sep 28 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 5 AM EDT TUESDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Areas of fog.
Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering south late. Areas of fog
through midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots. A slight chance of
showers. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Northwest gales to 35 knots backing west by mid
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ266-290800-
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 PM EDT Mon Sep 28 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...Northwest winds less than 10 knots. Areas
of fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots late. Areas of fog. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Areas of fog through early afternoon. A slight chance
of showers by mid afternoon. 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. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A slight chance of showers. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Northwest gales to 35 knots backing west by mid
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ267-290800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Mon Sep 28 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Areas of
fog. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots becoming south less than
10 knots after midnight. Areas of fog. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Areas of fog through early afternoon. 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.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers. Waves subsiding
to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of showers. Waves building to 1 to
3 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots by mid afternoon. Waves building to 4 to 8 feet
occasionally to 10 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.

$$

LSZ261-290200-
MAFOR 2821/
Superior West 11203 12213 11313 11410 12420 11410. A chance of
showers Tuesday afternoon. Waves 2 feet or less tonight. Waves 1
to 3 feet Tuesday.

Superior North Central 12303 11313 11323 14420. Waves 2 feet or
less tonight. Waves 1 to 3 feet Tuesday.

Superior South Central 11203 11303 11313 11323 11423 11420 11430
11440. Waves 2 feet or less tonight. Waves 1 to 3 feet building
to 2 to 4 feet Tuesday.

Superior East 12703 11103 12403 11413 11410 11420. Waves 1 foot
or less tonight. Waves 1 to 3 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