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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 13 July 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind light increasing to southwest 15 to 25 knots this morning then becoming southwest 15 this evening. Wind increasing to southwest 25 Tuesday morning then diminishing to westerly 15 Tuesday evening.

Scattered showers this afternoon and this evening. Scattered showers Tuesday evening with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Extended Forecast

Issued 06:00 AM EDT 13 July 2026
Wednesday Wind southwest 10 to 15 knots increasing to west 15 to 25 in the morning.
Thursday Wind light increasing to southwest 15 to 25 knots.
Friday Wind northwest 15 knots diminishing to 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 03:00 AM EDT 13 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 13 July 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today departing ridge located on a line north-south
over southern Quebec.

At 3:00 a.m. EDT today trough located on a line north-south over
northern Ontario.
By 8:00 p.m. EDT Tuesday trough located from Montréal to Labrador.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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