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Trois-Rivières to Donnacona

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 22 July 2026

Today Tonight and Thursday.

Strong wind warning in effect.

Wind southerly 15 knots increasing to southwest 15 to 25 this morning then becoming west 15 near noon Thursday. Wind diminishing to light Thursday evening.

Showers ending this morning. 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 22 July 2026
Friday Wind southwest 15 knots.
Saturday Wind light.
Sunday Wind light.

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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

Warnings (In effect)

Strong wind warning in effect

Trois-Rivières to Donnacona

Issued 04:26 AM EDT 22 July 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 22 July 2026 Today Tonight and Thursday At 3:00 a.m. EDT today low 991 mb located east of James Bay.
By 8:00 a.m. EDT Thursday low 994 mb located over northern Quebec.

At 3:00 a.m. EDT today cold front from low located over
Trois-Rivières.
By 8:00 a.m. EDT Thursday cold front from low located over
Anticosti Island.

At 8:00 a.m. EDT Thursday ridge located on a line north-south over
Lake Huron.
By 8:00 p.m. EDT Thursday ridge located on a line north-south
over Montréal.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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