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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:35 PM EDT 17 May 2026

Tonight and Monday.

Wind northwest 10 to 20 knots becoming light early this evening then becoming northeast 10 to 15 late overnight. Wind becoming light Monday morning.

Showers Monday morning with a risk of thunderstorms.

Extended Forecast

Issued 06:00 PM EDT 17 May 2026
Tuesday Wind southwest 15 knots increasing to southwest 20 to 30 in the morning.
Wednesday Wind southwest 20 to 30 knots veering to northwest 15 to 25.
Thursday 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 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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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 PM EDT 17 May 2026 Tonight and Monday At 3:00 p.m. EDT today cold front located on a line
northeast-southwest over Natashquan.
By 2:00 a.m. EDT Monday departing cold front located on a line
northeast-southwest over the Strait of Belle Isle.

At 3:00 p.m. EDT today ridge located from James Bay to Québec city.
By 8:00 p.m. EDT Monday ridge located from Hudson Bay to
Newfoundland.

At 5:00 a.m. EDT Monday low 1002 mb located over the Midwestern
states.
By 8:00 p.m. EDT Monday low 1009 mb located over western Quebec.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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