Station List

National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 301401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Fri Oct 30 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 stretching from Alberta to the Upper Great Lakes this morning will continue building to 30.4 inches over the Upper Great Lakes today. High pressure then shifts to the Lower Great Lakes by Saturday morning and strengthens to 30.5 inches, with ridging of around 30.2 inches lingering over Lake Superior through the weekend as the high gradually shifts to the Eastern Seaboard. A 29.6 inch Colorado low develops on Monday and moves into Minnesota by Tuesday morning. This low passes north of Lake Superior into northern Ontario Tuesday night at 29.5 inches, dragging troughing of at least 29.6 inches over the western half of the lake Tuesday into Wednesday.

LSZ162-302000
Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM
1001 AM EDT Fri Oct 30 2026 /901 AM CDT Fri Oct 30 2026/

REST OF TODAY
West winds 5 to 15 knots backing southwest late. Waves calm to 2 feet.

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

SATURDAY
South winds less than 10 knots becoming east 5 to 15 knots in the afternoon. A slight chance of rain showers by mid afternoon. Waves calm to 2 feet.

SATURDAY NIGHT
East winds 5 to 15 knots becoming southwest less than 10 knots after midnight. A chance of showers. Waves calm to 2 feet.

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

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

MONDAY
East winds 10 to 20 knots increasing to 20 to 30 knots. A chance of showers, then showers. Waves building to 3 to 6 feet occasionally to 8 feet.

TUESDAY
East winds 20 to 30 knots becoming west 15 to 25 knots. Showers, then a chance of showers. Waves subsiding to 1 to 3 feet.

LSZ263-302000
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 EDT Fri Oct 30 2026

REST OF TODAY
Northwest winds 5 to 15 knots backing west in the afternoon. Waves calm to 2 feet.

TONIGHT
West winds 5 to 15 knots becoming southwest less than 10 knots late. Waves calm to 2 feet.

SATURDAY
South winds less than 10 knots backing east late. Waves calm to 2 feet.

SATURDAY NIGHT
South winds 5 to 15 knots veering southwest after midnight. A chance of showers. Waves calm to 2 feet.

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

SUNDAY NIGHT
Southwest winds 5 to 15 knots diminishing to less than 10 knots after midnight. Waves calm to 2 feet.

MONDAY
Southeast winds 5 to 15 knots becoming east 15 to 25 knots. Showers likely. Waves building to 3 to 5 feet occasionally to 7 feet.

TUESDAY
Southeast gales to 35 knots becoming southwest 15 to 25 knots. Showers likely. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.

LSZ264-302000
Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border
1001 AM EDT Fri Oct 30 2026

REST OF TODAY
Northwest winds 5 to 15 knots becoming west 10 to 20 knots in the afternoon, then diminishing to 5 to 15 knots late. Waves 1 to 3 feet subsiding to calm to 2 feet.

TONIGHT
West winds 5 to 15 knots diminishing to less than 10 knots late. Waves calm to 2 feet.

SATURDAY
Southwest winds less than 10 knots backing south late. Waves calm to 2 feet.

SATURDAY NIGHT
South winds 5 to 15 knots veering southwest after midnight. A slight chance of showers. Waves calm to 2 feet.

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

SUNDAY NIGHT
Southwest winds 5 to 15 knots diminishing to less than 10 knots after midnight. Waves calm to 2 feet.

MONDAY
Southeast winds 5 to 15 knots increasing to 15 to 25 knots. Showers likely. Waves building to 2 to 4 feet.

TUESDAY
Southeast gales to 35 knots becoming south 15 to 25 knots. Showers likely. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.

LSZ265-302000
Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore
1001 AM EDT Fri Oct 30 2026

REST OF TODAY
Northwest winds 15 to 25 knots becoming west 10 to 20 knots late. Waves 1 to 3 feet subsiding to calm to 2 feet.

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

SATURDAY
Southwest winds 5 to 15 knots backing southeast late. Waves calm to 2 feet.

SATURDAY NIGHT
South winds 10 to 20 knots. A slight chance of showers. Waves calm to 2 feet.

SUNDAY
Southwest winds 10 to 20 knots becoming south 5 to 15 knots by mid afternoon. Waves calm to 2 feet.

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

MONDAY
Southeast winds 5 to 15 knots increasing to 20 to 30 knots. Showers likely. Waves building to 2 to 4 feet.

TUESDAY
Southeast gales to 35 knots becoming south 20 to 30 knots. Showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 1 to 3 feet.

LSZ266-302000
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 EDT Fri Oct 30 2026

REST OF TODAY
Northwest winds 15 to 25 knots diminishing to 10 to 20 knots late. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 4 feet.

TONIGHT
West winds 5 to 15 knots increasing to 10 to 20 knots late. Waves subsiding to calm to 2 feet.

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

SATURDAY NIGHT
South winds 10 to 20 knots. A slight chance of showers. Waves calm to 2 feet.

SUNDAY
South winds 10 to 20 knots becoming southwest 5 to 15 knots by mid afternoon. Waves calm to 2 feet.

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

MONDAY
South winds 5 to 15 knots becoming southeast 20 to 30 knots. Showers likely. Waves building to 3 to 5 feet occasionally to 7 feet.

TUESDAY
Southeast gales to 35 knots becoming south 20 to 30 knots. Showers. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.

LSZ267-302000
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border
1001 AM EDT Fri Oct 30 2026

REST OF TODAY
Northwest winds 15 to 25 knots. A chance of rain showers by mid afternoon. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 4 feet.

TONIGHT
Northwest winds 10 to 20 knots becoming west 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.

SATURDAY
Southwest winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then backing south late. Waves calm to 2 feet.

SATURDAY NIGHT
South winds 10 to 20 knots. A slight chance of showers after midnight. Waves calm to 2 feet.

SUNDAY
South winds 10 to 20 knots diminishing to 5 to 15 knots by mid afternoon. A slight chance of showers. Waves calm to 2 feet.

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

MONDAY
Southeast winds 5 to 15 knots increasing to 15 to 25 knots. Waves building to 2 to 4 feet.

TUESDAY
Southeast gales to 35 knots becoming south 20 to 30 knots. Showers. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.

LSZ261-302000
MAFOR 3015/ Superior West 12600 14500 12400. Waves 1 foot or less.

Superior North Central 11720 11620 12610 13600 11500. Waves 1 to 3 feet this afternoon and tonight. Waves 1 foot or less Saturday morning.

Superior South Central 12720 11710 11610 12600 12500. Waves 2 to 4 feet subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet subsiding to 1 foot or less tonight. Waves 1 foot or less Saturday morning.

Superior East 13720 11710 13600 11510. Waves 3 to 5 feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 2 feet tonight. Waves 1 to 2 feet Saturday morning.

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