398
FZUS63 KMQT 231500
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Sun Nov 23 2025

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 29.8 inch trough currently resides on the Quebec/Ontario lines
south of James Bay, dissipating as it tracks east today. Meanwhile,
a 30.2 inch high passing south of the Great Lakes today will result
in a 30.0 inch ridge passing over the lake today. In its wake, a
29.8 inch truogh will pass just north of Lake Superior tonight
through Monday. Monday night into Tuesday, a 29.8 inch low will
organize just west of the Great Lakes, deepening to 29.6 inches
Tuesday night over the Michigan Upper Peninsula and passing over
eastern Lake Superior at 29.4 inches Wednesday. This low deepens
further to 29.3 inches over Quebec Thursday while 30.5 inch high
pressure builds over the Northern Great Plains. This high moves over
Lake Superior Friday into the weekend.


LSZ162-232100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Sun Nov 23 2025 /900 AM CST Sun Nov 23 2025/

.REST OF TODAY...West winds 10 to 20 knots becoming southwest
5 to 15 knots by mid afternoon. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of rain in the morning, then
rain in the afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Rain in the evening. Snow.
Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Snow likely, then a chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-232100-
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-
1000 AM EST Sun Nov 23 2025

.REST OF TODAY...Northwest winds 10 to 20 knots backing west by
late morning, then becoming southwest 5 to 15 knots by mid
afternoon. Waves 3 to 5 feet occasionally to 7 feet subsiding to
1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots becoming southwest 10 to
20 knots late. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of rain in the morning, then
rain likely in the afternoon. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots becoming north
gales to 35 knots after midnight. Rain and snow. Waves building
to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...North gales to 40 knots becoming northwest gales to
35 knots. Snow showers likely, then a chance of snow showers.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.

$$

LSZ264-232100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Sun Nov 23 2025

.REST OF TODAY...Northwest winds 15 to 25 knots becoming west
5 to 15 knots by mid afternoon. Waves 4 to 7 feet occasionally to
9 feet subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south by
midnight, then veering southwest late. Waves subsiding to calm to
2 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then becoming northwest 5 to 15 knots by mid afternoon.
Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A slight chance of rain after midnight. Waves subsiding
to calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of rain. Waves building to
2 to 4 feet.
.TUESDAY NIGHT...Northeast winds 20 to 30 knots increasing to
gales to 40 knots after midnight. Rain and snow. Waves building
to 8 to 11 feet occasionally to 14 feet.
.WEDNESDAY...North gales to 40 knots backing northwest. Snow,
then a chance of snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet.

$$

LSZ265-232100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Sun Nov 23 2025

.REST OF TODAY...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by late morning, then becoming west 10 to 20 knots
by mid afternoon. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then veering southwest late. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots veering west by late
morning, then becoming northwest 5 to 15 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A chance of rain. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A chance of rain in the morning, then
rain likely in the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming northeast
gales to 35 knots after midnight. Rain. Snow after midnight.
Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 40 knots. Rain. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 8 to 11 feet occasionally to 14 feet.
.THURSDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Snow showers likely, then a chance of snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-232100-
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-
1000 AM EST Sun Nov 23 2025

.REST OF TODAY...Northwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 10 to 20 knots.
Waves 9 to 12 feet occasionally to 15 feet subsiding to 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 10 to 20 knots backing south by
midnight, then increasing to 15 to 25 knots late. Waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming west 5 to 15 knots by mid
afternoon. A slight chance of. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. A chance of rain. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A chance of rain in the morning, then rain in
the afternoon. Waves building to 1 to 3 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots increasing to gales to
35 knots after midnight. Rain. Snow after midnight. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...Northwest gales to 45 knots. Rain. Snow showers.
Waves building to 12 to 17 feet occasionally to 21 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet.
.THURSDAY...Northwest gales to 35 knots. Snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.

$$

LSZ267-232100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Sun Nov 23 2025

...GALE WARNING IN EFFECT UNTIL NOON EST TODAY...

.REST OF TODAY...Northwest gales to 40 knots diminishing to 15 to
25 knots by mid afternoon. A slight chance of rain showers late
in the morning. Waves 10 to 14 feet occasionally to 18 feet
subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 10 to 20 knots backing south by midnight,
then increasing to 15 to 25 knots late. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 5 to 15 knots backing southeast
after midnight. A chance of rain in the evening, then rain likely
after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots. Rain. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 15 to 25 knots becoming southeast
20 to 30 knots after midnight. Rain. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. Rain. Snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet.
.THURSDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Snow showers. Waves subsiding to 9 to 12 feet
occasionally to 15 feet, then building to 10 to 14 feet
occasionally to 18 feet.

$$

LSZ261-232100-
MAFOR 2316/
Superior West 11620 12510 11410 13520 11620. Waves 2 to 4 feet
subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet
building to 2 to 4 feet tonight. Waves 2 to 4 feet Monday
morning.

Superior North Central 11730 11620 12510 11410 11420 12520. Waves
3 to 6 feet subsiding to 2 to 4 feet this afternoon. Waves 2 to 4
feet tonight and Monday morning.

Superior South Central 11740 11720 11610 12410 11420 12520. Waves
5 to 8 feet subsiding to 3 to 5 feet this afternoon. Waves 2 to 4
feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet Monday
morning.

Superior East...GALE WARNING IN EFFECT...12740 11720 11510 11410
11420 11430 11530. Waves 8 to 12 feet subsiding to 5 to 8 feet
this afternoon. Waves 3 to 6 feet subsiding to 2 to 4 feet
tonight. Waves 3 to 5 feet Monday morning.

$$

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