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Marine Forecast

Issued 08:00 PM ADT 12 August 2026

Tonight and Thursday.

Wind southwest 15 knots diminishing to light late overnight then becoming southwest 15 Thursday afternoon.

Scattered showers this evening with a risk of thunderstorms. Scattered showers Thursday afternoon and evening with a risk of thunderstorms.

Waves

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

Extended Forecast

Issued 03:30 PM ADT 12 August 2026
Friday Wind southwest 15 knots veering to northwest 15 in the afternoon.
Saturday Wind northwest 15 knots.
Sunday Wind light becoming southwest 15 knots late in the day.

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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 8:00 PM ADT 12 August 2026 Tonight and Thursday At 8:00 p.m. ADT tonight departing trough located northeast of
Newfoundland.

At 10:00 a.m. ADT Thursday trough located over New England.
By 8:00 p.m. ADT Thursday trough located from the Gaspe Peninsula
to Cape Cod.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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