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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 25 October 2026

Tonight and Monday.

Strong wind warning in effect.

Wind west 20 knots veering to north 20 near midnight then diminishing to north 15 late overnight. Wind diminishing to north 10 Monday morning then veering to northeast 10 Monday evening.

Waves

Issued 06:30 PM EDT 25 October 2026
Tonight and Monday. Waves 1.5 metres subsiding to 1 early Monday morning and to 0.5 or less near noon Monday.

Extended Forecast

Issued 06:30 PM EDT 25 October 2026
Tuesday Wind light increasing to southeast 20 knots in the afternoon.
Wednesday Wind south 25 knots diminishing to southwest 15.
Thursday Wind southwest 15 knots veering to northwest 15.

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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 6:30 PM EDT 25 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 25 October 2026 Tonight and Monday At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 6:30 p.m. EDT tonight cold front located on a line
northeast-southwest over North Channel.
By 6:30 p.m. EDT Monday cold front located on a line
northeast-southwest over the East Coast of the U.S.

By 10:30 a.m. EDT Monday high 1034 mb located over northwestern
Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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