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Montréal to Trois-Rivières

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Forecast

Marine Forecast

Issued 11:56 AM EDT 13 August 2026

Today Tonight and Friday.

Wind westerly 15 knots with gusts to 30 near thunderstorms. Wind becoming northwest 10 to 15 this evening. Wind northwest 10 to 15 Friday.

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

Extended Forecast

Issued 06:00 AM EDT 13 August 2026
Saturday Wind light.
Sunday Wind light.
Monday Wind light becoming west 10 to 15 knots.

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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

Warnings (In effect)

Squall warning in effect

Montréal to Trois-Rivières

Issued 2:27 PM EDT 13 August 2026 Squalls accompanied by gusts of up to 35 knots, frequent lightning and hail are expected or occurring in the area.

Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately. Take cover immediately, if threatening weather approaches. Consider delaying or postponing travel in areas under the squall warning.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 13 August 2026 Today Tonight and Friday At 3:00 a.m. EDT today trough located from the Strait of Belle
Isle to New England.
By 8:00 p.m. EDT Friday trough located from Labrador to Cabot
Strait.

At 8:00 p.m. EDT Friday approaching high 1024 mb located over
northeastern Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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