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Government of Canada / Gouvernement du Canada

Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 19 March 2026

Today Tonight and Friday.

Wind light becoming southeast 10 knots near midnight then increasing to southwest 15 Friday morning. Wind diminishing to northwest 10 Friday afternoon then becoming light Friday evening.

Scattered showers or scattered flurries ending near noon. Scattered showers Friday. Fog patches forming this evening and dissipating Friday morning.

Waves

Issued 03:00 AM EDT 19 March 2026
Today Tonight and Friday. Waves less than 0.5 metres building to 0.5 or less overnight and to 0.5 to 1 Friday morning. Waves subsiding to 0.5 or less Friday evening.

Extended Forecast

Issued 03:00 AM EDT 19 March 2026
Saturday Wind light.
Sunday Wind southwest 15 knots increasing to north 20 late in the day.
Monday Wind north 20 knots diminishing to light.

Ice Forecast*

Issued 12:00 PM EDT 18 March 2026 Today Tonight and Thursday 2 tenths new lake ice.

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 18 March 2026 Today Tonight and Thursday

Ice Coverage

2 tenths new lake ice.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 19 March 2026 Today Tonight and Friday At 3:00 a.m. EDT today low 1010 mb located over northeastern
Ontario.
By 3:00 a.m. EDT Friday departing low 1013 mb located over Quebec.

At 3:00 a.m. EDT today ridge located on a line north-south over
eastern Manitoba.
By 3:00 a.m. EDT Friday ridge located on a line north-south over
eastern Ontario.

By 3:00 a.m. EDT Friday low 1005 mb located over northwestern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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