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Warnings

Forecast

Marine Forecast

Issued 08:00 PM ADT 12 September 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind light increasing to southerly 10 to 15 knots near midnight and to southeasterly 20 Sunday evening.

Rain Sunday late in the day. Risk of thunderstorms late Sunday evening. Fog patches forming early Sunday evening.

Waves

Issued 05:00 PM ADT 12 September 2026
Tonight and Sunday. Seas 1 metre or less.

Extended Forecast

Issued 03:30 PM ADT 12 September 2026
Monday Wind westerly 15 knots increasing to northwest 25 in the afternoon.
Tuesday Wind northerly 15 knots diminishing to light.
Wednesday Wind southwest 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Grand Manan New Carlisle Pointe-au-Père Fundy Park (Alma) Port Menier Miramichi Île Bicquette Charlo Cap-Chat Bathurst Airport CFB Bagotville Jonquière Mistook Normandin Roberval Airport Île-d'Orléans - Quai de St-Jean Deschambault North Bay Airport Beauport L'Isle-aux-Grues Bas Caraquet Lake Nipissing - 45152 Pointe-des-Monts L'Assomption Baie-Comeau Airport Saint-Anicet Cap-Rouge Sainte-Anne-de-Bellevue Lac Memphrémagog Montréal Metropolitain Airport Île Rouge Montréal-Trudeau Int'l Airport Lac Saint-Pierre Trois-Rivières Airport Pointe de l'Islet Pointe Claveau Sept-Îles Airport Kouchibouguac North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport La Pocatière Miscou Island Mont-Joli Airport
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land station Land Station
Ice Conditions

Ice Forecasts

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

Warnings (In effect)

Strong wind warning in effect

Lurcher

Issued 8:00 PM ADT 12 September 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 8:00 PM ADT 12 September 2026 Tonight and Sunday At 8:00 p.m. ADT tonight ridge located over the southern Marine
District.
By 3:00 a.m. ADT Sunday departing ridge located over the eastern
Marine District.

At 3:00 a.m. ADT Sunday trough located from Quebec to the Great
Lakes.
By 8:00 p.m. ADT Sunday trough located from Labrador to Cape Cod.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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