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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 12 November 2025

Today Tonight and Thursday.

Strong wind warning in effect.

Wind northwest 25 knots backing to west 20 early Thursday morning then diminishing to northwest 15 Thursday afternoon. Wind diminishing to northwest 10 Thursday evening.

Scattered showers ending this evening.

Waves

Issued 10:30 AM EST 12 November 2025
Today Tonight and Thursday. Waves 1 to 1.5 metres building to 2 near noon then subsiding to 1 to 1.5 late overnight. Waves subsiding to 0.5 to 1 Thursday evening.

Extended Forecast

Issued 03:00 AM EST 12 November 2025
Friday Wind northwest 15 knots becoming southeast 15 in the morning then increasing to southeast 25 late in the day.
Saturday Wind southeast 25 knots.
Sunday Wind northwest 25 knots.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 10:30 AM EST 12 November 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 12 November 2025 Today Tonight and Thursday At 10:30 a.m. EST today dissipating ridge located over Quebec.

At 10:30 a.m. EST today low 995 mb located over northeastern
Ontario.
By 10:30 a.m. EST Thursday departing trough located on a line
north-south over central Quebec.

By 10:30 a.m. EST Thursday approaching ridge located on a line
northwest-southeast over Illinois.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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