National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 120201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Thu Jun 11 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

A 29.3 inch low lifts through the eastern lake tonight. Behind the low, troughing progressively weakens to 29.7 inches tomorrow through tomorrow night. While troughing looks to restrengthen to 29.6 inches on Saturday, expect weak ridging of 29.8 inches to return to Lake Superior on Sunday. A 29.7 inch trough moves through the lake Sunday night before 29.8 inch ridging pushes back in on Monday.

LSZ162-120800
Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM
1000 PM EDT Thu Jun 11 2026 /900 PM CDT Thu Jun 11 2026/

REST OF TONIGHT
Southwest winds 10 to 20 knots becoming west 15 to 25 knots after midnight, then backing southwest late. A chance of showers by midnight. Waves calm to 2 feet building to 2 to 4 feet.

FRIDAY
Southwest winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.

FRIDAY NIGHT
West winds 15 to 25 knots backing southwest after midnight. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.

SATURDAY
West winds 15 to 25 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

SATURDAY NIGHT
West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
West winds 15 to 25 knots. Waves building to 2 to 4 feet.

SUNDAY NIGHT
West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves subsiding to calm to 2 feet.

MONDAY
West winds 10 to 20 knots diminishing to 5 to 15 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

TUESDAY
Southwest winds 5 to 15 knots veering west. Waves calm to 2 feet.

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LSZ263-120800
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 PM EDT Thu Jun 11 2026

REST OF TONIGHT
Southwest winds 5 to 15 knots becoming west 15 to 25 knots after midnight. Showers by midnight, then a slight chance of showers after midnight. Waves 1 to 3 feet subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet.

FRIDAY
Southwest winds 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet.

FRIDAY NIGHT
Southwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then increasing to 15 to 25 knots late. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.

SATURDAY
West winds 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

SATURDAY NIGHT
West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.

SUNDAY
West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.

SUNDAY NIGHT
West winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.

MONDAY
West winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet.

TUESDAY
Southwest winds 5 to 15 knots backing south. Waves calm to 2 feet.

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LSZ264-120800
Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border
1000 PM EDT Thu Jun 11 2026

REST OF TONIGHT
West winds 5 to 15 knots increasing to 15 to 25 knots after midnight. Showers by midnight, then a chance of showers after midnight. Waves calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.

FRIDAY
West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.

FRIDAY NIGHT
Southwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.

SATURDAY
West winds 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

SATURDAY NIGHT
West winds 10 to 20 knots. Waves subsiding to 2 to 4 feet.

SUNDAY
West winds 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

SUNDAY NIGHT
West winds 10 to 20 knots. Waves subsiding to 2 to 4 feet.

MONDAY
West winds 10 to 20 knots diminishing to 5 to 15 knots. Waves subsiding to calm to 2 feet.

TUESDAY
Southwest winds 5 to 15 knots backing south. Waves calm to 2 feet.

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LSZ265-120800
Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore
1000 PM EDT Thu Jun 11 2026

REST OF TONIGHT
North winds 15 to 25 knots backing west after midnight, then increasing to 20 to 30 knots late. Showers. Waves calm to 2 feet building to 2 to 4 feet.

FRIDAY
West winds 15 to 25 knots increasing to 20 to 30 knots in the afternoon. A slight chance of showers by mid afternoon. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.

FRIDAY NIGHT
Southwest winds 15 to 25 knots. A slight chance of showers. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.

SATURDAY
West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. A slight chance of showers. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.

SATURDAY NIGHT
West winds 15 to 25 knots. Waves subsiding to 1 to 3 feet.

SUNDAY
West winds 20 to 30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

SUNDAY NIGHT
West winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet.

MONDAY
West winds 10 to 20 knots. Waves subsiding to calm to 2 feet.

TUESDAY
Southeast winds 10 to 20 knots veering south. Waves calm to 2 feet.

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LSZ266-120800
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 PM EDT Thu Jun 11 2026

REST OF TONIGHT
North winds 10 to 20 knots becoming northwest 15 to 25 knots after midnight, then becoming west 20 to 30 knots late. Showers and a slight chance of thunderstorms by midnight, then a slight chance of showers after midnight. Waves calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.

FRIDAY
West winds 15 to 25 knots. A slight chance of showers and thunderstorms by mid afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.

FRIDAY NIGHT
Southwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. A slight chance of showers. Waves subsiding to 2 to 4 feet.

SATURDAY
Southwest winds 15 to 25 knots veering west by mid afternoon. A slight chance of showers and thunderstorms. Waves building to 3 to 5 feet occasionally to 7 feet.

SATURDAY NIGHT
West winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.

SUNDAY
West winds 15 to 25 knots increasing to 20 to 30 knots by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.

SUNDAY NIGHT
West winds 15 to 25 knots. Waves subsiding to 2 to 4 feet.

MONDAY
West winds 10 to 20 knots. Waves subsiding to calm to 2 feet.

TUESDAY
West winds 5 to 15 knots backing south. Waves calm to 2 feet.

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LSZ267-120800
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
1000 PM EDT Thu Jun 11 2026

REST OF TONIGHT
East winds 10 to 20 knots becoming west 20 to 30 knots after midnight. Showers and a chance of thunderstorms by midnight, then a chance of showers after midnight. Waves calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.

FRIDAY
West winds 20 to 30 knots diminishing to 10 to 20 knots in the afternoon. A slight chance of showers and thunderstorms by mid afternoon. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.

FRIDAY NIGHT
Southwest winds 10 to 20 knots increasing to 15 to 25 knots late. A slight chance of showers. Waves 2 to 4 feet.

SATURDAY
Southwest winds 15 to 25 knots becoming west 10 to 20 knots by mid afternoon. A chance of showers and a slight chance of thunderstorms. Waves subsiding to 1 to 3 feet.

SATURDAY NIGHT
West winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.

SUNDAY
West winds 15 to 25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

SUNDAY NIGHT
West winds 15 to 25 knots. Waves subsiding to 2 to 4 feet.

MONDAY
West winds 10 to 20 knots. Waves subsiding to calm to 2 feet.

TUESDAY
Southwest winds 5 to 15 knots backing south. Waves calm to 2 feet.

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LSZ261-120800
MAFOR 1203/ Superior West 11520 11630 12530 12540 12530. A chance of showers overnight. Waves 1 to 3 feet building to 2 to 4 feet overnight. Waves 2 to 4 feet building to 3 to 6 feet Friday. Waves 3 to 5 feet Friday evening.

Superior North Central 11626 11636 12630 13540 11530. Waves 1 to 3 feet building to 2 to 4 feet overnight. Waves 3 to 6 feet building to 4 to 7 feet Friday. Waves 4 to 7 feet Friday evening.

Superior South Central 11736 11636 14630 11630 11530. Waves 1 to 2 feet building to 2 to 4 feet overnight. Waves 3 to 5 feet Friday. Waves 3 to 5 feet subsiding to 2 to 4 feet Friday evening.

Superior East 11136 11746 11630 11530 11520 11510 12520. A chance of thunderstorms overnight. Waves 2 to 4 feet building to 3 to 5 feet overnight. Waves 3 to 6 feet Friday and Friday evening.

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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