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Montréal to Trois-Rivières

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 July 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind southwest 10 to 15 knots backing to southeasterly 10 to 15 late this morning then becoming southwest 10 to 20 late this afternoon. Wind veering to northwest 15 to 25 near midnight then becoming northwesterly 15 Sunday evening.

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

Extended Forecast

Issued 06:00 PM EDT 17 July 2026
Sunday Wind northwest 15 to 25 knots.
Monday Wind southwest 10 to 15 knots.
Tuesday Wind southwest 10 to 15 knots backing to south 20.

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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

Montréal to Trois-Rivières

Issued 03:00 AM EDT 18 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 18 July 2026 Today Tonight and Sunday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Trois-Rivières.
By 8:00 a.m. EDT Sunday dissipating ridge located on a line
northwest-southeast over the Strait of Belle Isle.

At 3:00 a.m. EDT today intensifying low 1005 mb located over
northern Lake Michigan.
By 8:00 p.m. EDT Sunday low 987 mb located over western Anticosti
Island.

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

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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