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Government of Canada / Gouvernement du Canada

Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 19 March 2026

Today Tonight and Friday.

Wind southwest 15 knots diminishing to southwest 10 early this evening then becoming light late this evening. Wind increasing to southeast 15 Friday morning then veering to southwest 20 near noon Friday. Wind diminishing to northwest 10 Friday evening.

Periods of snow ending early this morning. Rain Friday morning and afternoon with a risk of freezing rain Friday morning changing to scattered showers. Visibility as low as 1 mile in rain.

Waves

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

Extended Forecast

Issued 03:00 AM EDT 19 March 2026
Saturday Wind light.
Sunday Wind light becoming northeast 15 knots late in the day.
Monday Wind north 15 knots backing to west 20 late in the day.

Ice Forecast*

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

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

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Huron 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

Open water.

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 Huron Area

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Marine Weather for Canada

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