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Trois-Rivières to Donnacona

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 28 July 2026

Tonight and Wednesday.

Wind northeast 10 to 15 knots with gusts to 45 near thunderstorms late this afternoon and this evening. Wind northeast 10 to 15 Wednesday.

Showers. Risk of thunderstorms late this afternoon and this evening and Wednesday afternoon and evening. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 28 July 2026
Thursday Wind northeast 10 to 15 knots.
Friday Wind light.
Saturday 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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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

Trois-Rivières to Donnacona

Issued 5:01 PM EDT 28 July 2026 This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 45 knots, frequent lightning, hail and poor to very poor visibilities due to showers at times heavy.

Proceed with caution as visibility may suddenly be reduced to near-zero. Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

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 PM EDT 28 July 2026 Tonight and Wednesday At 3:00 p.m. EDT today quasi-stationary trough located from Cornwall
to Labrador.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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