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Eastern Lake Superior

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 20 October 2026

Today Tonight and Wednesday.

Wind southeast 15 knots increasing to south 15 to 20 early this evening then becoming southwest 15 late overnight. Wind diminishing to light Wednesday afternoon.

Scattered showers Wednesday afternoon.

Waves

Issued 10:30 AM EDT 20 October 2026
Today Tonight and Wednesday. Waves 0.5 to 1 metre building to 1.5 this evening then subsiding to 1 early Wednesday morning. Waves subsiding to 0.5 or less Wednesday evening.

Extended Forecast

Issued 03:00 AM EDT 20 October 2026
Thursday Wind light.
Friday Wind south 20 knots.
Saturday Wind south 25 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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 20 October 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today high 1034 mb located over northeastern
Ontario.
By 10:30 a.m. EDT Wednesday high 1030 mb located over southern
Quebec.

At 10:30 a.m. EDT today trough located on a line northeast-southwest
over Manitoba.
By 10:30 a.m. EDT Wednesday trough located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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