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Northumberland Strait

Warnings

Forecast

Marine Forecast

Issued 08:00 PM ADT 20 July 2026

Tonight and Tuesday.

Wind southwesterly 10 to 15 knots increasing to southerly 15 to 20 Tuesday afternoon.

Extended Forecast

Issued 03:30 PM ADT 20 July 2026
Wednesday Wind southeasterly 25 knots.
Thursday Wind southwesterly 15 to 20 knots.
Friday Wind southwesterly 15 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 8:00 PM ADT 20 July 2026 Tonight and Tuesday At 8:00 p.m. ADT tonight departing low 992 mb located north of
Anticosti Island.

At 8:00 p.m. ADT tonight ridge located over the southern Marine
District.
By 3:30 p.m. ADT Tuesday ridge located east of the Marine District.

At 8:00 p.m. ADT Tuesday approaching trough located over New
England.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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