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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 10:38 AM EDT 27 July 2026

Today Tonight and Tuesday.

Wind light today tonight and Tuesday.

Showers this afternoon and this evening. Risk of thunderstorms late this afternoon. Showers Tuesday late in the day with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 27 July 2026
Wednesday Wind northeast 10 to 15 knots.
Thursday Wind northeast 10 to 15 knots.
Friday 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 - Quai de St-Jean 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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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 27 July 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today trough located on a line northeast-southwest
over Labrador.
By 8:00 p.m. EDT Tuesday quasi-stationary trough located over Lake
Ontario to Pointe-des-Monts.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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