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Eastern Lake Superior

Forecast

Marine Forecast

Issued 10:30 AM EDT 19 July 2025

Today Tonight and Sunday.

Wind light becoming northwest 10 knots early this evening then backing to west 10 Sunday morning.

Scattered showers ending this evening. Fog patches.

Waves

Issued 10:30 AM EDT 19 July 2025
Today Tonight and Sunday. Waves 0.5 metres or less.

Extended Forecast

Issued 03:36 AM EDT 19 July 2025
Monday Wind light.
Tuesday Wind light becoming southeast 15 knots late in the day.
Wednesday Wind south 15 to 20 knots diminishing to light late in the day.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 19 July 2025 Tonight and Sunday At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over Lower Michigan.
By 6:30 p.m. EDT Sunday departing trough located over the East
Coast of the U.S.

At 6:30 p.m. EDT tonight high 1017 mb located over Lake Winnipeg.
By 6:30 p.m. EDT Sunday building high 1019 mb located over Lake
Superior.

Great Lakes - Lake Superior Area

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