850
FZUS63 KMQT 131501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EST Thu Nov 13 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...

30.0 to 30.1 inch ridging becomes widespread over Lake Superior
today, but begins to decrease Friday as a 29.1 inch low moves into
Manitoba. This system will pull a 29.4 inch trough through Lake
Superior Saturday. Afterwards, ridging will slowly build over the
lake into next week, eventually reaching 30.0 inches Monday. This
ridge builds to 30.2 inches by late Tuesday.


LSZ162-132100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EST Thu Nov 13 2025 /901 AM CST Thu Nov 13 2025/

.REST OF TODAY...West winds 10 to 20 knots. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots backing east by midnight.
Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. A slight chance of showers after midnight. Waves calm
to 2 feet.
.SATURDAY...West winds 15 to 25 knots increasing to gales to
35 knots in the afternoon. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots veering northwest. Waves
subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots veering northeast. Waves
calm to 2 feet.

$$

LSZ263-132100-
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-
1001 AM EST Thu Nov 13 2025

.REST OF TODAY...West winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves 4 to 7 feet occasionally to
9 feet subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots becoming east 5 to 15 knots
by midnight, then veering southeast late. Waves subsiding to calm
to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.FRIDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A slight chance of showers after
midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest gales to
35 knots in the afternoon. A chance of rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Waves 5 to
8 feet occasionally to 10 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Waves subsiding to 2 to
4 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-132100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EST Thu Nov 13 2025

.REST OF TODAY...West winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves 5 to 8 feet occasionally to
10 feet subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots by midnight, then veering east late. Waves subsiding to
calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of showers after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest gales to
35 knots in the afternoon. A chance of rain showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
6 to 9 feet occasionally to 11 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Waves building to
7 to 10 feet occasionally to 13 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ265-132100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EST Thu Nov 13 2025

.REST OF TODAY...West winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots. Waves
3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing southeast late. Waves
subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots. A slight chance of
showers after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest gales to
35 knots in the afternoon. A chance of showers. Waves building to
5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of rain
showers in the evening. A chance of snow showers. Waves building
to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.

$$

LSZ266-132100-
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-
1001 AM EST Thu Nov 13 2025

.REST OF TODAY...West winds 20 to 30 knots veering northwest by
mid afternoon. Waves 7 to 10 feet occasionally to 13 feet
subsiding to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 5 to
15 knots by midnight, then veering east late. Waves subsiding to
1 to 3 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A slight chance of showers after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...West winds 15 to 25 knots becoming northwest gales to
35 knots in the afternoon. Showers in the morning, then a chance
of showers in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers,
possibly mixed with snow in the evening, then snow showers likely
after midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers likely, then
a chance of snow showers. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain and snow showers. Waves subsiding to
1 to 3 feet.

$$

LSZ267-132100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EST Thu Nov 13 2025

.REST OF TODAY...Northwest winds to 30 knots with a few gale
force gusts to 35 knots possible. Isolated rain showers late in
the morning. Waves 6 to 10 feet occasionally to 13 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots by midnight, then veering north late. Waves subsiding to
1 to 3 feet.
.FRIDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.FRIDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. A chance of rain showers after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...South winds 15 to 25 knots becoming northwest gales
to 35 knots in the afternoon. Showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers in
the evening. Snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain and snow showers. Waves subsiding to
1 to 3 feet.

$$

LSZ261-132100-
MAFOR 1316/
Superior West 12630 11620 11610 11200 11210 12310. Waves 3 to 5
feet this afternoon. Waves 2 to 4 feet subsiding to 2 feet or
less tonight. Waves 1 to 2 feet Friday morning.

Superior North Central 12640 11730 11720 11810 11200 11310 11320.
Waves 5 to 8 feet this afternoon. Waves 3 to 6 feet subsiding to
1 to 3 feet tonight. Waves 1 to 3 feet Friday morning.

Superior South Central 11640 11740 11730 11720 11710 11100 11310
11320. Waves 5 to 8 feet this afternoon. Waves 3 to 6 feet
subsiding to 1 to 3 feet tonight. Waves 2 feet or less Friday
morning.

Superior East 13740 11730 11820 11810 11200 11310. Waves 6 to 10
feet this afternoon. Waves 5 to 8 feet subsiding to 3 to 5 feet
tonight. Waves 2 to 3 feet Friday 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