FZUS63 KMQT 141501
GLFLS

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

LSZ162-142100
Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM
1001 AM EST Fri Nov 14 2025 /901 AM CST Fri Nov 14 2025/

REST OF TODAY
Southeast winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet building to 1 to 3 feet, then subsiding to calm to 2 feet.

TONIGHT
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 15 to 25 knots increasing to 30 knots with a few gale force gusts to 35 knots possible. A 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. 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 5 to 15 knots veering north. Waves calm to 2 feet.

TUESDAY
North winds 5 to 15 knots backing northwest. Waves calm to 2 feet.

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LSZ263-142100
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 AM EST Fri Nov 14 2025

REST OF TODAY
Southeast winds 10 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet.

TONIGHT
South winds 10 to 20 knots veering southwest late. A slight chance of showers after midnight. Waves subsiding to 1 to 3 feet.

SATURDAY
West winds 15 to 25 knots increasing to 30 knots with a few gale force gusts to 35 knots possible by late morning, then veering northwest by mid 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 diminishing to 20 to 30 knots after midnight. Waves 5 to 8 feet occasionally to 10 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
Northwest winds 5 to 15 knots. Waves calm to 2 feet.

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LSZ264-142100
Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border
1001 AM EST Fri Nov 14 2025

GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING

REST OF TODAY
Southeast winds 10 to 20 knots increasing to 20 to 30 knots by mid afternoon. Waves 1 to 3 feet building to 4 to 7 feet occasionally to 9 feet.

TONIGHT
South winds 15 to 25 knots becoming southwest 10 to 20 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 5 feet occasionally to 7 feet.

SATURDAY
Northwest winds 20 to 30 knots increasing to gales to 35 knots. A chance of rain showers. Waves building to 6 to 9 feet occasionally to 11 feet.

SATURDAY NIGHT
Northwest gales to 35 knots. A slight chance of snow showers in the evening. Waves building to 6 to 10 feet occasionally to 13 feet.

SUNDAY
Northwest gales to 35 knots. A slight chance of snow showers. 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 15 to 25 knots becoming north 5 to 15 knots. Waves subsiding to calm to 2 feet.

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

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LSZ265-142100
Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore
1001 AM EST Fri Nov 14 2025

GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING

REST OF TODAY
Southeast winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Waves calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.

TONIGHT
South winds 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet.

SATURDAY
West winds 20 to 30 knots becoming northwest gales to 40 knots. A chance of showers. Waves subsiding to calm to 2 feet, then building to 6 to 9 feet occasionally to 11 feet.

SATURDAY NIGHT
Northwest gales to 45 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 6 to 9 feet occasionally to 11 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 6 feet occasionally to 8 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 becoming west 5 to 15 knots. A chance of snow showers. Waves calm to 2 feet.

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LSZ266-142100
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 AM EST Fri Nov 14 2025

GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING

REST OF TODAY
Southeast winds 10 to 20 knots increasing to 20 to 30 knots by mid afternoon. Waves 1 to 3 feet building to 3 to 6 feet occasionally to 8 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 10 to 14 feet occasionally to 18 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 11 to 15 feet occasionally to 19 feet, then subsiding to 10 to 14 feet occasionally to 18 feet.

SUNDAY
Northwest gales to 40 knots. Snow showers in the morning, then a chance of snow showers 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 diminishing to 10 to 20 knots. A chance of snow showers. A chance of rain showers. Waves subsiding to 1 to 3 feet.

TUESDAY
Northwest winds 10 to 20 knots diminishing to 5 to 15 knots. A chance of rain and snow showers. Waves subsiding to calm to 2 feet.

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LSZ267-142100
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
1001 AM EST Fri Nov 14 2025

GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING

REST OF TODAY
Southeast winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Waves calm to 2 feet building to 2 to 4 feet.

TONIGHT
Southeast winds 20 to 30 knots veering south late. A slight chance of showers after midnight. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

SATURDAY
South winds 15 to 25 knots becoming west 20 to 30 knots by late morning, then becoming northwest gales to 40 knots by mid afternoon. Rain showers likely. Waves subsiding to 2 to 4 feet, then building to 10 to 14 feet occasionally to 18 feet.

SATURDAY NIGHT
Northwest gales to 40 knots. Rain showers likely in the evening. Snow showers. Waves building to 11 to 15 feet occasionally to 19 feet, then subsiding 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 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 diminishing to 10 to 20 knots. A chance of rain and snow showers. Waves subsiding to 1 to 3 feet.

TUESDAY
Northwest winds 10 to 20 knots. A chance of rain and snow showers. Waves subsiding to calm to 2 feet.

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LSZ261-142100
MAFOR 1416/ Superior West 12300 11310 11410 12510 11620 11630. A chance of showers Saturday morning. Waves 2 feet or less this afternoon and tonight. Waves 1 to 2 feet building to 2 to 4 feet Saturday morning.

Superior North Central 12330 11340 11440 12430 11620 11740. A chance of showers Saturday morning. Waves 2 to 4 feet building to 4 to 7 feet this afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet tonight. Waves 3 to 5 feet Saturday morning.

Superior South Central 11320 11330 11340 12440 11430 11520 11640. A chance of showers Saturday morning. Waves 2 to 4 feet this afternoon. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Saturday morning.

Superior East 12320 11330 11340 12440 11430 11536. Waves 2 to 4 feet this afternoon. Waves 3 to 5 feet building to 4 to 7 feet tonight. Waves 3 to 6 feet Saturday morning.

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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