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Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 16 September 2026

Today Tonight and Thursday.

Wind light becoming southwest 15 knots near noon then diminishing to light overnight. Wind becoming southwest 10 to 15 Thursday evening.

Fog patches forming Thursday afternoon.

Waves

Issued 05:00 PM ADT 15 September 2026
Tonight and Wednesday. Seas 1 metre or less.

Extended Forecast

Issued 03:00 AM ADT 16 September 2026
Friday Wind southwest 15 knots increasing to northwest 25 to 30 in the afternoon.
Saturday Wind north 20 knots diminishing to light.
Sunday 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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 16 September 2026 Today Tonight and Thursday At 3:00 a.m. ADT today weakening trough located on a line
northeast-southwest over Laurentian Fan.
By 3:30 p.m. ADT today departing trough located on a line
northeast-southwest over Laurentian Fan.

At 3:00 a.m. ADT today quasi-stationary ridge located over Nova
Scotia.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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