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Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 18 July 2026

Today Tonight and Sunday.

Wind light increasing to southwesterly 15 to 20 knots early this evening. Wind southwesterly 15 to 20 Sunday.

Showers tonight and Sunday morning with a risk of thunderstorms. Fog patches forming overnight and dissipating Sunday afternoon.

Waves

Issued 05:00 PM ADT 17 July 2026
Tonight and Saturday. Seas 1 metre or less.

Extended Forecast

Issued 03:00 AM ADT 18 July 2026
Monday Wind westerly 15 to 20 knots.
Tuesday Wind southerly 15 knots.
Wednesday Wind southeast 25 knots.

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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

Ice Forecasts

Issued 10:00 AM EDT 19 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 18 July 2026 Today Tonight and Sunday At 3:00 a.m. ADT today departing low located over Labrador.

At 3:30 p.m. ADT today low 997 mb located over southern Quebec.
By 3:30 p.m. ADT Sunday low 987 mb located over the Gaspe Peninsula.

Marine Weather Statement

Issued 2:44 AM ADT 18 July 2026 A low pressure system centered over Southern Quebec this afternoon
will move east to lie over the Gaspé Peninsula by Sunday afternoon.
Strong to gale force south to southeasterlies are expected southeast
of the low.

Marine interests are advised gale warnings are in effect for
Banquereau, Cabot Strait, Gulf - Magdalen, and Anticosti - eastern
half.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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