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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 21 June 2025

Today Tonight and Sunday.

Wind light increasing to southeast 10 to 15 knots early this evening and to southwest 15 to 20 near midnight. Wind diminishing to west 10 to 15 Sunday afternoon then becoming light Sunday evening.

Showers overnight and Sunday morning with a risk of thunderstorms. Scattered showers Sunday evening. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 21 June 2025
Monday Wind light.
Tuesday Wind southwest 10 to 20 knots.
Wednesday Wind northwest 15 knots veering to northeast 10 to 15 late in the day.

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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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land station Land Station
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 21 June 2025 Today Tonight and Sunday At 3:00 a.m. EDT today low 995 mb located near Gaspé.
By 5:00 a.m. EDT Sunday low 998 mb located off Labrador.

At 3:00 a.m. EDT today ridge located from James Bay to Lake Ontario.
By 8:00 p.m. EDT Sunday weakening ridge located on a line
north-south over Newfoundland.

At 8:00 p.m. EDT tonight low located over southern James Bay.
By 8:00 p.m. EDT Sunday weakening low located over New Brunswick.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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