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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 15 July 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind west 15 to 25 knots diminishing to west 10 to 15 this evening then increasing to northwest 20 to 30 late Thursday morning. Wind diminishing to northwest 15 Thursday evening.

Scattered showers this afternoon. Scattered showers Thursday afternoon with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 15 July 2026
Friday Wind northwest 15 knots.
Saturday Wind light becoming southwest 10 to 15 knots.
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

Cornwall to Montréal

Issued 3:00 PM EDT 15 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 PM EDT 15 July 2026 Tonight and Thursday At 3:00 p.m. EDT today quasi-stationary low 989 mb located over
Labrador.

At 3:00 p.m. EDT today trough located on a line east-west over
James Bay.
By 8:00 p.m. EDT Thursday trough located on a line
northeast-southwest over the Gulf of St. Lawrence.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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