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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 15 March 2026

Today Tonight and Monday.

Wind light increasing to northeast 15 knots this afternoon and to southeast 20 to 30 near midnight. Wind veering to southwest 20 to 30 Monday evening.

Snow this afternoon and this evening. Rain Monday evening. Visibility 1 mile or less in snow.

Temperatures minus 4 falling to minus 9 this morning then rising to plus 13 Monday evening.

Extended Forecast

Issued 06:00 PM EDT 14 March 2026
Monday Wind southeast 15 to 25 knots.
Tuesday Wind southwest 25 to 35 knots diminishing to west 15 to 25 late in the day.
Wednesday Wind west 15 to 25 knots diminishing to westerly 10 to 15.

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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 AM EDT 15 March 2026 Today Tonight and Monday At 3:00 a.m. EDT today departing low 996 mb located near
Newfoundland.

At 3:00 a.m. EDT today ridge located on a line north-south over
western Québec city.
By 4:00 p.m. EDT Monday ridge located on a line northwest-southeast
over Newfoundland.

At 4:00 p.m. EDT today low 991 mb located over the Midwestern
states.
By 8:00 p.m. EDT Monday low 988 mb located over southwestern Quebec.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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