National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 282001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Thu May 28 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 30.3 inch high pressure over the Great Lakes will weaken through Friday to 30.0 inches as another high pressure dives south from the Hudson Bay. This high pressure will reach the Upper Great Lakes on Saturday at 30.3 inches and remain over the area through Sunday. The high will weaken on Monday as another 30.3 inch approaches the area from the north, which will build over the Great Lakes on Tuesday.

LSZ162-290800
Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM
401 PM EDT Thu May 28 2026 /301 PM CDT Thu May 28 2026/

LATE THIS AFTERNOON
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
North winds 5 to 15 knots backing southwest late. Waves calm to 2 feet.

FRIDAY
Southwest winds 5 to 15 knots. Waves calm to 2 feet.

FRIDAY NIGHT
Northeast winds 5 to 15 knots increasing to 15 to 25 knots. Waves building to 2 to 4 feet.

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

SATURDAY NIGHT
Northeast winds 15 to 25 knots diminishing to 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
South winds 5 to 15 knots veering southwest by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Northwest winds 5 to 15 knots becoming northeast 10 to 20 knots after midnight. Waves calm to 2 feet.

MONDAY
Northeast winds 10 to 20 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.

TUESDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

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LSZ263-290800
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 EDT Thu May 28 2026

LATE THIS AFTERNOON
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
East winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet.

FRIDAY
Southwest winds 5 to 15 knots backing east late. Waves calm to 2 feet.

FRIDAY NIGHT
East winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 2 to 4 feet.

SATURDAY
East winds 10 to 20 knots becoming northeast 15 to 25 knots by mid afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.

SATURDAY NIGHT
East winds 10 to 20 knots becoming south 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
Southwest winds less than 10 knots increasing to 5 to 15 knots by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
West winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet.

MONDAY
Northeast winds 10 to 20 knots diminishing to 5 to 15 knots. Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.

TUESDAY
Northeast winds 5 to 15 knots veering east. Waves calm to 2 feet.

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LSZ264-290800
Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border
401 PM EDT Thu May 28 2026

LATE THIS AFTERNOON
South winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
South winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots backing east late. Waves calm to 2 feet.

FRIDAY NIGHT
East winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 2 to 4 feet.

SATURDAY
East winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. Waves subsiding to 1 to 3 feet.

SATURDAY NIGHT
East winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
Southwest winds less than 10 knots. Waves calm to 2 feet.

SUNDAY NIGHT
West winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet.

MONDAY
East winds 5 to 15 knots backing northeast. Waves calm to 2 feet.

TUESDAY
East winds 5 to 15 knots veering southeast. Waves calm to 2 feet.

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LSZ265-290800
Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore
401 PM EDT Thu May 28 2026

LATE THIS AFTERNOON
East winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
Southeast winds 5 to 15 knots veering south after midnight, then veering west late. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots increasing to 10 to 20 knots in the afternoon, then becoming northeast 5 to 15 knots late. Waves calm to 2 feet.

FRIDAY NIGHT
East winds 5 to 15 knots increasing to 10 to 20 knots after midnight. Waves building to 2 to 4 feet.

SATURDAY
East winds 15 to 25 knots. Waves 2 to 4 feet.

SATURDAY NIGHT
Southeast winds 10 to 20 knots becoming south 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
Southwest winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Southwest winds 5 to 15 knots backing northeast after midnight. Waves calm to 2 feet.

MONDAY
Northeast winds 5 to 15 knots backing north. Waves calm to 2 feet.

TUESDAY
East winds 5 to 15 knots veering southeast. Waves calm to 2 feet.

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LSZ266-290800
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 EDT Thu May 28 2026

LATE THIS AFTERNOON
West winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
Southeast winds less than 10 knots becoming south 5 to 15 knots after midnight, then veering west late. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots veering north late. Waves calm to 2 feet.

FRIDAY NIGHT
Northeast winds 10 to 20 knots becoming east 15 to 25 knots after midnight, then diminishing to 10 to 20 knots late. Waves building to 2 to 4 feet.

SATURDAY
East winds 10 to 20 knots. Waves subsiding to 1 to 3 feet.

SATURDAY NIGHT
Southeast winds 5 to 15 knots veering south after midnight. Waves subsiding to calm to 2 feet.

SUNDAY
Southwest winds 5 to 15 knots veering west by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
Northwest winds 5 to 15 knots veering northeast after midnight. Waves calm to 2 feet.

MONDAY
Northeast winds 5 to 15 knots backing north. Waves calm to 2 feet.

TUESDAY
Northeast winds 5 to 15 knots veering south. Waves calm to 2 feet.

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LSZ267-290800
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
401 PM EDT Thu May 28 2026

LATE THIS AFTERNOON
Northwest winds 5 to 15 knots. Waves calm to 2 feet.

TONIGHT
Northwest winds less than 10 knots becoming southwest 5 to 15 knots after midnight. Waves calm to 2 feet.

FRIDAY
West winds 5 to 15 knots veering northwest late. Waves calm to 2 feet.

FRIDAY NIGHT
Northeast winds 10 to 20 knots becoming east 15 to 25 knots after midnight, then diminishing to 10 to 20 knots late. Waves building to 1 to 3 feet.

SATURDAY
East winds 5 to 15 knots backing northeast by mid afternoon. Waves subsiding to calm to 2 feet.

SATURDAY NIGHT
Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet.

SUNDAY
Southwest winds 5 to 15 knots veering northwest by mid afternoon. Waves calm to 2 feet.

SUNDAY NIGHT
North winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
North winds 10 to 20 knots. Waves calm to 2 feet.

TUESDAY
Northwest winds 10 to 20 knots becoming south 5 to 15 knots. Waves calm to 2 feet.

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LSZ261-290200
MAFOR 2821/ Superior West 12100 11700 11600 11500 13510. Waves 1 foot or less.

Superior North Central 11300 12400 11500 12610 11620 11610. Waves 2 feet or less.

Superior South Central 12310 11400 11500 12610 11620 11810. Waves 2 feet or less.

Superior East 11700 11600 11400 11500 11510 11600 12700. Waves 2 feet or less.

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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