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Western Lake Superior

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 May 2025

Today Tonight and Saturday.

Wind light becoming south 10 knots early this morning then veering to southwest 10 near noon. Wind becoming variable 10 early this evening then increasing to north 15 near midnight. Wind diminishing to light near noon Saturday.

Scattered showers this afternoon and this evening.

Waves

Issued 03:00 AM EDT 09 May 2025
Today Tonight and Saturday. Waves 0.5 metres or less building to 0.5 to 1 overnight then subsiding to 0.5 or less Saturday afternoon.

Extended Forecast

Issued 03:00 AM EDT 09 May 2025
Sunday Wind light increasing to south 20 knots in the morning.
Monday Wind south 15 knots.
Tuesday Wind south 15 knots.

Ice Forecast*

Issued 12:00 PM EDT 8 May 2025 Today Tonight and Friday Open water except 1 tenth thick lake ice in Black Bay and Nipigon Bay and in the extreme northeastern Thunder Bay section. Consolidated rotten thick lake ice in eastern Black Bay and western Nipigon Bay.

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

 

[ Canadian Ice Service ]

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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 8 May 2025 Today Tonight and Friday

Ice Coverage

Open water except 1 tenth thick lake ice in Black Bay and Nipigon Bay and in the extreme northeastern Thunder Bay section. Consolidated rotten thick lake ice in eastern Black Bay and western Nipigon Bay.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 9 May 2025 Today Tonight and Saturday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake Superior.
By 3:00 a.m. EDT Saturday ridge located on a line
northeast-southwest over southwestern Ontario.

At 3:00 a.m. EDT today cold front located over the Ontario -
Manitoba border.
By 3:00 a.m. EDT Saturday cold front located from James Bay to
Whitefish Bay.

Great Lakes - Lake Superior Area

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Marine Weather for Canada

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