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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 July 2026

Today Tonight and Sunday.

Wind northwest 15 to 20 knots becoming northwest 15 near noon then diminishing to northwest 10 this evening. Wind becoming light overnight then becoming southwest 10 Sunday morning. Wind backing to south 10 Sunday afternoon then becoming variable 10 Sunday evening.

Scattered showers ending this morning. Scattered showers Sunday evening. Smoke. Visibility as low as 1 mile in smoke.

Waves

Issued 03:00 AM EDT 18 July 2026
Today Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 near midnight.

Extended Forecast

Issued 03:00 AM EDT 18 July 2026
Monday Wind southwest 20 knots veering to northwest 15 late in the day.
Tuesday Wind northwest 15 knots increasing to northwest 20.
Wednesday Wind northwest 15 knots backing to southwest 15 late in the day.

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Map of Great Lakes - Lake Superior marine weather areas Kenora Airport Pukaskwa National Park Royal Island Armstrong Airport Caribou Island Marathon Airport Thunder Bay Airport Welcome Island Little Flatland Island Sault Ste. Marie Airport Wawa Airport Slate Island - 45136 Lake Of the Woods - 45148
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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 3:00 AM EDT 18 July 2026 Today Tonight and Sunday At 3:00 a.m. EDT today departing ridge located over Quebec.

At 3:00 a.m. EDT today low 1006 mb located over Lake Superior.
By 3:00 a.m. EDT Sunday low 992 mb located over eastern Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
Saskatchewan.
By 3:00 a.m. EDT Sunday ridge located on a line north-south over
northern Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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