639
FZUS63 KMQT 142102
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EST Fri Nov 14 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 eastern Lake Superior this morning continues
east into Ontario as a 29.2 inch low lifts out of the Canadian
Prairies towards Hudson Bay today. This low extends a 29.4 inch
trough across Lake Superior tonight into Saturday morning, gradually
weakening to 29.8 inches as developing low pressure over New England
this weekend deepens to 28.8 inches over the Canadian Maritimes
Sunday night into Monday. Meanwhile, 30.1 inch high pressure
extending from Saskatchewan to the Dakotas this weekend builds to
30.3 inches as it shifts east to the Great Lakes by Tuesday. The
high then lifts into New England late Wednesday.


LSZ162-150900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EST Fri Nov 14 2025 /301 PM CST Fri Nov 14 2025/

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering southwest by
midnight, then veering west late. A slight chance of showers
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then veering northwest by mid
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 to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-150900-
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 EST Fri Nov 14 2025

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...South winds 10 to 20 knots becoming west 5 to 15 knots
late. A chance of showers after midnight. Waves subsiding to 1 to
3 feet.
.SATURDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A slight chance of rain showers in the
morning. Waves building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight. Waves building to 4 to 8 feet
occasionally to 10 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-150900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EST Fri Nov 14 2025

...GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 10 to
20 knots. A slight chance of showers after midnight. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. A chance of rain showers in the morning. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Waves building
to 6 to 10 feet occasionally to 13 feet.
.SUNDAY...Northwest winds 20 to 30 knots. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west. Waves calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-150900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EST Fri Nov 14 2025

...GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Southeast winds 15 to 25 knots veering south by
midnight, then diminishing to 10 to 20 knots late. 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
35 knots. A chance of showers in the morning. Waves building to
5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. A slight chance of
snow showers after midnight. Waves building to 6 to 10 feet
occasionally to 13 feet.
.SUNDAY...Northwest gales to 35 knots. A slight chance of snow
showers. Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves calm to
2 feet.

$$

LSZ266-150900-
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 EST Fri Nov 14 2025

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots late. 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
40 knots. A chance of rain 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. A chance of rain
showers in the evening. A chance of snow showers. Waves building
to 10 to 14 feet occasionally to 18 feet.
.SUNDAY...Northwest gales to 40 knots. A chance of 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. A chance of snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves calm to
2 feet.

$$

LSZ267-150900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EST Fri Nov 14 2025

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY
EVENING...

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...Southeast winds 20 to 30 knots increasing to gales to
35 knots by midnight, then becoming south 20 to 30 knots late. A
slight chance of showers after midnight. Waves building to 4 to
8 feet occasionally to 10 feet.
.SATURDAY...South winds 15 to 25 knots becoming northwest 20 to
30 knots by late morning, then increasing to gales to 40 knots by
mid afternoon. A chance of rain showers. Waves subsiding to 2 to
4 feet, then building to 8 to 11 feet occasionally to 14 feet.
.SATURDAY NIGHT...Northwest gales to 40 knots. Rain showers
likely, possibly mixed with snow showers in the evening, then
snow showers likely, possibly mixed with rain showers after
midnight. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY...Northwest gales to 40 knots. Snow showers likely. Waves
10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.MONDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots backing west. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves calm to
2 feet.

$$

LSZ261-150300-
MAFOR 1422/
Superior West 11210 11410 11510 11610 11620 11720 11730 11740. A
chance of showers Saturday morning. Waves 2 feet or less tonight.
Waves 1 to 3 feet building to 3 to 5 feet Saturday.

Superior North Central 11340 12440 11430 11620 13740. A chance of
showers Saturday morning. Waves 3 to 6 feet building to 5 to 9
feet, then subsiding to 4 to 7 feet tonight. Waves 3 to 6 feet
Saturday.

Superior South Central...GALE WARNING IN EFFECT...11340 11440
12430 11520 13740. A chance of showers Saturday morning. Waves 3
to 6 feet tonight. Waves 1 to 3 feet building to 5 to 8 feet
Saturday.

Superior East...GALE WARNING IN EFFECT...11330 12340 11440 11430
11530 11740 11750. A chance of showers Saturday. Waves 3 to 6
feet building to 5 to 8 feet tonight. Waves 4 to 7 feet building
to 7 to 10 feet Saturday.

$$

WFO MQT

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weather.gov/mqt/glftable

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