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Cornwall to Montréal

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Forecast

Marine Forecast

Issued 03:00 PM EST 12 December 2025

Tonight and Saturday.

Wind west 15 to 25 knots diminishing to southwest 10 to 15 early this evening and to light near midnight. Wind becoming southwest 10 to 15 Saturday evening.

Periods of snow Saturday. Visibility 1 mile or less in snow.

Low tonight minus 9. High Saturday minus 2.

Extended Forecast

Issued 06:00 AM EST 12 December 2025
Sunday Wind light becoming northwest 15 knots in the afternoon.
Monday Wind northwest 15 knots backing to southwest 15.
Tuesday Wind southwest 10 to 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Montréal Metropolitain Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts 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 Miscou Island Kouchibouguac La Pocatière
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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 PM EST 12 December 2025 Tonight and Saturday At 3:00 p.m. EST today ridge located on a line north-south over
Lake Huron.
By 7:00 p.m. EST Saturday ridge located from the Gaspe Peninsula
to James Bay.

At 3:00 p.m. EST today trough located on a line north-south over
western Lake Superior.
By 7:00 p.m. EST Saturday trough located on a line north-south
over Lake Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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