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Lake Superior

Forecast

Marine Forecast

Issued 06:30 PM EDT 22 September 2026

Tonight and Wednesday.

Wind northeast 10 knots increasing to east 15 near midnight then diminishing to southeast 10 early Wednesday morning. Wind increasing to southeast 15 Wednesday evening.

Waves

Issued 06:30 PM EDT 22 September 2026
Tonight and Wednesday. Waves 0.5 metres building to 0.5 to 1 late overnight then subsiding to 0.5 Wednesday morning.

Extended Forecast

Issued 06:30 PM EDT 22 September 2026
Thursday Wind south 15 knots.
Friday Wind south 15 knots diminishing to light.
Saturday Wind light.

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Map of Great Lakes - Lake Superior marine weather areas Royal Island Kenora Airport Sault Ste. Marie Airport Armstrong Airport Caribou Island Marathon Airport Pukaskwa National Park Wawa Airport Thunder Bay Airport Welcome Island Little Flatland Island Slate Island - 45136 Lake Of the Woods - 45148
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buoy Buoy
land station Land Station
Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 22 September 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today quasi-stationary high 1032 mb located over
central Quebec.

Great Lakes - Lake Superior Area

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