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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 21 April 2026

Tonight and Wednesday.

Wind southwest 10 to 15 knots diminishing to light early this evening. Wind light Wednesday.

Low tonight minus 2. High Wednesday plus 11.

Extended Forecast

Issued 06:00 PM EDT 21 April 2026
Thursday Wind light becoming north 10 to 15 knots in the afternoon.
Friday Wind light.
Saturday Wind light.

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Map of St. Lawrence - St. Lawrence River marine weather areas Miramichi North Cape Port Menier Roberval Airport Normandin Mistook Jonquière CFB Bagotville Cap-Chat Île Bicquette Charlo North Bay Airport Yarmouth Airport Brier Island St. Stephen Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac Kouchibouguac Grand Manan Fundy Park (Alma) Bas Caraquet Bathurst Airport Lac Saint-Pierre Pointe-Noire Île d'Orléans Pointe-des-Monts L'Assomption Sept-Îles Airport Pointe Claveau Pointe de l'Islet Trois-Rivières Airport L'Isle-aux-Grues Deschambault Île Rouge Montréal-Trudeau Int'l Airport Montréal Metropolitain Airport Lac Memphrémagog Sainte-Anne-de-Bellevue Cap-Rouge Saint-Anicet Baie-Comeau Airport La Pocatière Pointe-au-Père New Carlisle Mont-Joli Airport Gaspé Airport Lake Nipissing - 45152 Rivière-la-Madeleine Beauport Cap-d'Espoir
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land station Land Station
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 PM EDT 21 April 2026 Tonight and Wednesday At 3:00 p.m. EDT today ridge located on a line north-south over
the Gaspe Peninsula.
By 8:00 p.m. EDT Wednesday ridge located on a line north-south
over Anticosti Island.

At 3:00 p.m. EDT today trough located on a line northeast-southwest
over Lake Superior.
By 8:00 p.m. EDT Wednesday trough located on a line north-south
over Lake Saint-Jean.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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