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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 07 September 2026

Today Tonight and Tuesday.

Wind light becoming west 10 to 15 knots near noon then becoming light early this evening. Wind light Tuesday.

Scattered showers Tuesday morning.

Extended Forecast

Issued 06:00 AM EDT 07 September 2026
Wednesday Wind light increasing to south 15 knots in the morning and to south 15 to 25 in the afternoon.
Thursday Wind southwest 15 to 25 knots veering to west 15 to 20.
Friday Wind northwest 15 knots diminishing to light late in the day.

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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 7 September 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today trough located from Anticosti Island to
Québec city.
By 2:00 a.m. EDT Tuesday departing trough located from the Quebec
Lower North Shore to Sept-Îles.

At 3:00 a.m. EDT today high 1029 mb located over northeastern
Manitoba.
By 8:00 p.m. EDT Tuesday high 1025 mb located near Saguenay River.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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