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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 10:14 AM EDT 05 October 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind west 10 to 20 knots increasing to west 20 to 30 near noon then becoming west 20 early Tuesday morning. Wind diminishing to westerly 10 to 15 Tuesday evening.

Showers ending this afternoon.

Extended Forecast

Issued 06:00 AM EDT 05 October 2026
Wednesday Wind light becoming southerly 10 to 15 knots in the morning.
Thursday Wind southwest 10 to 15 knots.
Friday Wind southwest 10 to 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Grand Manan New Carlisle Pointe-au-Père Fundy Park (Alma) Port Menier Miramichi Île Bicquette Charlo Cap-Chat Bathurst Airport CFB Bagotville Jonquière Mistook Normandin Roberval Airport Île-d'Orléans - Quai de St-Jean Deschambault North Bay Airport Beauport L'Isle-aux-Grues Bas Caraquet Lake Nipissing - 45152 Pointe-des-Monts L'Assomption Baie-Comeau Airport Saint-Anicet Cap-Rouge Sainte-Anne-de-Bellevue Lac Memphrémagog Montréal Metropolitain Airport Île Rouge Montréal-Trudeau Int'l Airport Lac Saint-Pierre Trois-Rivières Airport Pointe de l'Islet Pointe Claveau Sept-Îles Airport Kouchibouguac 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 La Pocatière Miscou Island Mont-Joli Airport
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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 10:14 AM EDT 05 October 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 5 October 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today low 995 mb located east of James Bay.
By 8:00 p.m. EDT Tuesday low 982 mb located over the Quebec Lower
North Shore.

At 3:00 a.m. EDT today ridge located on a line north-south over
the Midwestern states.
By 8:00 p.m. EDT Tuesday 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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