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Trois-Rivières to Donnacona

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 17 July 2026

Today Tonight and Saturday.

Wind northwest 10 to 15 knots becoming light early this evening. Wind light Saturday.

Showers overnight and Saturday. Risk of thunderstorms Saturday late in the day. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 17 July 2026
Sunday Wind northwest 10 to 20 knots.
Monday Wind southwest 10 to 15 knots.
Tuesday Wind southwest 10 to 15 knots.

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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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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 17 July 2026 Today Tonight and Saturday At 3:00 a.m. EDT today low 991 mb located over Labrador.
By 8:00 p.m. EDT Saturday weakening low 1001 mb located over
Labrador Coast.

At 3:00 a.m. EDT today ridge located on a line north-south over
Lake Huron.
By 2:00 a.m. EDT Saturday departing ridge located on a line
north-south over New England.

At 5:00 a.m. EDT Saturday intensifying low 1003 mb located over
northern Lake Huron.
By 8:00 p.m. EDT Saturday low 996 mb located over southwestern
Lake Saint-Jean.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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