223
FZUS63 KMQT 140301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM 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...

A 30.0 inch ridge over Lake Superior shifts east by early Friday
morning as a 29.2 inch low moves out of southern Alberta. This low
will reach northern Manitoba by Saturday morning extending a 29.5
inch trough across Lake Superior. Afterwards, low pressure over New
England on Sunday will deepen to 28.8 inches as it moves into
Labrador by Monday night. Meanwhile a 30.2 inch high will build from
the Dakotas north into northern Saskatchewan and Manitoba, with Lake
Superior sitting between this high and the low over eastern Canada.


LSZ162-140900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EST Thu Nov 13 2025 /901 PM CST Thu Nov 13 2025/

.REST OF TONIGHT...South winds 5 to 15 knots backing east by
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots veering southwest by
midnight, then becoming west 10 to 20 knots late. A slight chance
of showers after midnight. Waves calm to 2 feet.
.SATURDAY...West winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A slight chance of rain showers in the
morning. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Waves 3 to
5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots veering north. Waves
calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ263-140900-
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 PM EST Thu Nov 13 2025

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering east by
midnight, then veering southeast late. Waves 1 to 3 feet
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 veering southwest
late. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A chance of rain showers in the
morning. Waves building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Waves building to
5 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest gales to 35 knots. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. 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.
.TUESDAY...North winds 5 to 15 knots veering south. Waves calm to
2 feet.

$$

LSZ264-140900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EST Thu Nov 13 2025

.REST OF TONIGHT...North winds 5 to 15 knots veering east late.
Waves 2 to 4 feet 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 late. 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 20 to 30 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. A slight chance of
rain showers in the evening. A slight chance of snow showers.
Waves building to 6 to 10 feet occasionally to 13 feet.
.SUNDAY...Northwest gales to 40 knots. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots after midnight. Waves 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 calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.

$$

LSZ265-140900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EST Thu Nov 13 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight, then backing southeast late. Waves
1 to 3 feet 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 20 to 30 knots becoming northwest gales to
40 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 10 feet occasionally to 13 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of snow showers.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. Waves
calm to 2 feet.

$$

LSZ266-140900-
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 PM EST Thu Nov 13 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots by midnight, then veering east late. Waves 3 to
6 feet occasionally to 8 feet subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 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 late. 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 20 to 30 knots becoming northwest gales to
40 knots in the afternoon. Showers in the morning, then a chance
of showers in the afternoon. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A chance of rain
and snow showers 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. A chance of snow showers
in the morning, then snow showers likely in the afternoon. Waves
subsiding to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. 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.
.TUESDAY...North winds 10 to 20 knots backing northwest. A chance
of rain showers. Waves subsiding to calm to 2 feet.

$$

LSZ267-140900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EST Thu Nov 13 2025

.REST OF TONIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots by midnight, then veering northeast late. Waves
4 to 7 feet occasionally to 9 feet subsiding to 1 to 3 feet.
.FRIDAY...Southeast winds 10 to 20 knots 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
late. A chance of showers after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY...South winds 20 to 30 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 8 to 11 feet
occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers in
the evening. Snow showers. A slight chance of rain showers after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers. Waves 10 to
14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. 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.
.TUESDAY...North winds 10 to 20 knots backing northwest. A chance
of snow showers. A chance of rain showers. Waves subsiding to
calm to 2 feet.

$$

LSZ261-140900-
MAFOR 1404/
Superior West 11200 11210 13310 11300 11310 11410. Waves 2 feet
or less.

Superior North Central 11810 11200 11310 11320 12330 11340 11440.
Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to
3 feet building to 3 to 6 feet Friday. Waves 4 to 7 feet Friday
evening.

Superior South Central 11710 11100 11310 11320 12330 12440. Waves
1 to 3 feet overnight. Waves 1 to 3 feet building to 2 to 4 feet
Friday. Waves 2 to 4 feet building to 3 to 5 feet Friday evening.

Superior East 11710 11100 11200 11310 12320 11330 11340. Waves 3
to 6 feet overnight. Waves 2 to 4 feet Friday. Waves 3 to 6 feet
Friday evening.

$$

WFO MQT

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weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes