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Government of Canada / Gouvernement du Canada

L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 19 March 2026

Today Tonight and Friday.

Wind light becoming southwest 15 knots this evening then diminishing to light Friday morning. Wind becoming southwest 10 to 15 Friday afternoon then becoming light Friday evening.

Flurries this afternoon and tonight. Snow Friday late in the day. Visibility 1 mile or less in precipitation.

Temperatures minus 10 rising to minus 1 this afternoon.

Waves

Issued 03:00 AM EDT 19 March 2026
Today Tonight and Friday. Over open water seas 1 metre or less.

Extended Forecast

Issued 06:00 AM EDT 19 March 2026
Saturday Wind light.
Sunday Wind light increasing to northeast 15 to 25 knots.
Monday Wind northeast 15 to 25 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas
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Ice Conditions

There is no ice forecast issued for this area.

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 ridge located on a line northwest-southeast
over Anticosti Island.
By 8:00 p.m. EDT tonight departing ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 a.m. EDT today trough located from James Bay to Lake
Superior.
By 8:00 p.m. EDT Friday trough located from Labrador to Sept-Îles.

At 8:00 p.m. EDT tonight low 1005 mb located over Manitoba.
By 8:00 p.m. EDT Friday low 1006 mb located south of Quebec.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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