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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 09 August 2026

Today Tonight and Monday.

Wind southwest 10 to 15 knots becoming light near midnight. Wind light Monday.

Scattered showers ending this morning with a risk of thunderstorms. Scattered showers Monday afternoon and evening with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 09 August 2026
Tuesday Wind west 10 to 20 knots.
Wednesday Wind southwest 10 to 15 knots.
Thursday Wind light.

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Map of St. Lawrence - St. Lawrence River marine weather areas Grand Manan New Carlisle Pointe-au-Père Fundy Park (Alma) Port Menier Miramichi Île Bicquette Charlo Cap-Chat Bathurst Airport CFB Bagotville Jonquière Mistook Normandin Roberval Airport Île-d'Orléans - Quai de St-Jean Deschambault North Bay Airport Beauport L'Isle-aux-Grues Bas Caraquet Lake Nipissing - 45152 Pointe-des-Monts L'Assomption Baie-Comeau Airport Saint-Anicet Cap-Rouge Sainte-Anne-de-Bellevue Lac Memphrémagog Montréal Metropolitain Airport Île Rouge Montréal-Trudeau Int'l Airport Lac Saint-Pierre Trois-Rivières Airport Pointe de l'Islet Pointe Claveau Sept-Îles Airport Kouchibouguac North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport La Pocatière Miscou Island Mont-Joli Airport
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buoy Buoy
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 AM EDT 9 August 2026 Today Tonight and Monday At 3:00 a.m. EDT today trough located on a line north-south over
central Quebec.
By 8:00 p.m. EDT Monday trough located from Labrador to Sept-Îles.

At 3:00 a.m. EDT today ridge located on a line north-south over
the Midwestern states.
By 11:00 a.m. EDT Monday departing ridge located from New England
to Lake Saint-Jean.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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