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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 01 October 2026

Tonight and Friday.

Strong wind warning in effect.

Wind west 15 knots veering to northwest 15 this evening then increasing to northwest 20 early Friday morning. Wind diminishing to northwest 15 Friday afternoon and to northwest 10 Friday evening.

Scattered showers Friday.

Waves

Issued 06:30 PM EDT 01 October 2026
Tonight and Friday. Waves 1 metre building to 1.5 Friday morning then subsiding to 1 Friday evening.

Extended Forecast

Issued 06:30 PM EDT 01 October 2026
Saturday Wind light increasing to south 20 knots late in the day.
Sunday Wind southwest 20 knots veering to northwest 25.
Monday Wind northwest 20 knots.

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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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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

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 8:38 PM EDT 01 October 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 1 October 2026 Tonight and Friday At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over Lake Huron.
By 6:30 p.m. EDT Friday trough located on a line northeast-southwest
over the East Coast of the U.S.

At 6:30 p.m. EDT tonight high 1023 mb located over North Dakota.
By 6:30 p.m. EDT Friday high 1026 mb located over Wisconsin.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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