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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 July 2025

Today Tonight and Thursday.

Strong wind warning in effect.

Wind light becoming southwest 10 to 15 knots this morning then becoming light this evening. Wind increasing to southwest 15 near noon Thursday and to southwest 20 to 30 Thursday evening.

Showers overnight and Thursday with a risk of thunderstorms. Visibility 1 mile or less in showers.

Extended Forecast

Issued 06:00 PM EDT 15 July 2025
Thursday Wind light increasing to southwest 15 to 20 knots in the afternoon.
Friday Wind northwest 10 to 15 knots backing to southwest 10 to 15.
Saturday Wind southwest 10 to 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Saint-Hubert Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts 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 Miscou Island Kouchibouguac La Pocatière
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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 03:00 AM EDT 16 July 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 16 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located on a line north-south over
Rimouski.
By 8:00 p.m. EDT tonight weakening ridge located on a line
northwest-southeast over the Quebec Lower North Shore.

At 3:00 a.m. EDT today warm front from low located on a line
east-west over Lake Superior.
By 8:00 p.m. EDT Thursday low 998 mb located north of Québec city.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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