572
FZUS63 KMQT 260201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Fri Sep 25 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...

30.3 inch high pressure remains stretched out over the Great Lakes
basin tonight. On Saturday the high begins shifting northeast toward
northern Quebec while a 29.4 inch low deepens and moves over the
northern Canadian Prairies. Sunday through Monday, the high shifts
east to the Canadian Maritimes, weakening to 30.1 inches. This
gradually weakens ridging over Lake Superior from 30.1 inches Sunday
morning to 29.9 inches by late Monday as a 29.8 inch trough
approaches from the west. By Tuesday evening the trough will move
over Lake Superior at around 29.7 inches.



LSZ162-260800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Fri Sep 25 2026 /901 PM CDT Fri Sep 25 2026/

.REST OF TONIGHT...East winds 5 to 15 knots backing northeast
after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. A slight chance of showers after midnight. Waves calm
to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A slight chance of showers through early afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...West winds less than 10 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...East winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.

$$

LSZ263-260800-
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 EDT Fri Sep 25 2026

.REST OF TONIGHT...East winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. A slight chance of showers after midnight. Waves calm
to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. A slight chance of showers through early afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ264-260800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Fri Sep 25 2026

.REST OF TONIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots veering west
after midnight. Waves calm to 2 feet.
.MONDAY...North winds less than 10 knots veering southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-260800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Fri Sep 25 2026

.REST OF TONIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then diminishing to 5 to 15 knots late. Waves
calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming west 15 to
25 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-260800-
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 EDT Fri Sep 25 2026

.REST OF TONIGHT...East winds 5 to 15 knots veering southeast
after midnight, then backing east late. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering southeast in the
afternoon, then backing east late. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northeast winds less than 10 knots becoming
northwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ267-260800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Fri Sep 25 2026

.REST OF TONIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then backing northeast late. Waves
calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing northeast late.
Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots veering southwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ261-260800-
MAFOR 2603/
Superior West 11200 11100 13200 13210. Waves 2 feet or less.

Superior North Central 14300 11300 13310. Waves 2 feet or less.

Superior South Central 14300 11310 12220 11320. Waves 2 feet or
less.

Superior East 12200 11100 14200 11200. Waves 1 foot or less.

$$

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