042
FZUS63 KMQT 242001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Sat Oct 24 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...

30.4 inch high pressure remains sprawled out over the Northeast US,
while a 29.8 inch shortwave trough moving towards Hudson Bay drags a
weak 30.1 inch trough towards Lake Superior. The trough remains over
the lake the first half of the night before lifting northward. High
pressure of 30.6 inches over the Canadian Prairies on Sunday pushes
ridging of 30.4 inches over the Upper Great Lakes. High pressure
becomes centered over northern Ontario at 30.5 inches Monday into
Tuesday. A weak 30.0 inch low lifts north over Minnesota on Tuesday.
Then, a 29.8 inch low quickly follows a similar northeast track over
the Dakotas/northwestern Minnesota Tuesday night into Wednesday
while the high moves to New England. The low then tracks northeast
over northern Ontario on Wednesday.



LSZ162-250800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Sat Oct 24 2026 /300 PM CDT Sat Oct 24 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. A chance of showers through
midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots veering east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers. 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 15 to 25 knots becoming southeast
5 to 15 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves subsiding to
1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. A
chance of showers. Waves building to 2 to 4 feet, then 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.

$$

LSZ263-250800-
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 Sat Oct 24 2026

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. A chance
of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TONIGHT...West winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of showers through midnight. Waves subsiding
to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Rain showers likely. Waves building to 2 to
4 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 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...South winds 15 to 25 knots veering west. A chance of
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-250800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Sat Oct 24 2026

.LATE THIS AFTERNOON...South winds 15 to 25 knots. A slight
chance of showers. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. A chance of showers through midnight.
Waves subsiding to 1 to 3 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to 1 to 3 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 after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A chance of showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...South winds 15 to 25 knots veering west. A chance of
showers. Waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-250800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Sat Oct 24 2026

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...South winds 15 to 25 knots becoming southwest 10 to
20 knots after midnight, then veering west late. A slight chance
of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. A slight chance of showers
through early afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots becoming north 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Northeast 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 showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of showers. Waves 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming west 20 to
30 knots. A chance of showers. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-250800-
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 Sat Oct 24 2026

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...South winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight, then becoming west 10 to 20 knots late.
A chance of showers. Waves subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots. A slight chance of showers
through early afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming north
15 to 25 knots after midnight. Waves 2 to 4 feet.
.MONDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 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. A chance of showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...South winds 20 to 30 knots becoming west 15 to
25 knots. A chance of showers. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ267-250800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Sat Oct 24 2026

.LATE THIS AFTERNOON...South winds 20 to 30 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 20 to 30 knots becoming southwest 15 to
25 knots late. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots. A chance of showers through
early afternoon. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then veering north late. Waves
building to 2 to 4 feet.
.MONDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots veering east after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots. Waves building
to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of showers. Waves subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ261-250200-
MAFOR 2421/
Superior West 11510 15610 11620. A chance of showers this
evening. Waves 1 to 3 feet.

Superior North Central 11430 11520 11510 14620 11620. A chance of
showers this evening. Waves 4 to 7 feet subsiding to 2 to 4 feet
tonight. Waves 2 to 4 feet Sunday.

Superior South Central 12440 11540 11620 12720 12620. A chance of
showers overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet
tonight. Waves 1 to 3 feet Sunday.

Superior East 13440 11536 11620 11710 12610. Waves 3 to 6 feet
tonight. Waves 2 to 4 feet Sunday.

$$

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