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Marine Forecast

Issued 03:00 AM ADT 19 August 2026

Today Tonight and Thursday.

Wind northwesterly 10 to 15 knots diminishing to light near noon then becoming southwesterly 10 to 15 early this evening. Wind diminishing to light Thursday evening.

Scattered showers ending this morning. Fog patches.

Waves

Issued 05:00 PM ADT 18 August 2026
Tonight and Wednesday. Seas 1 to 2 metres.

Extended Forecast

Issued 03:00 AM ADT 19 August 2026
Friday Wind light.
Saturday Wind light becoming easterly 10 to 15 knots.
Sunday Wind southeast 15 to 20 knots veering to southerly 20 to 25.

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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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buoy Buoy
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 19 August 2026 Today Tonight and Thursday At 3:00 a.m. ADT today trough located from the Gulf of St. Lawrence
to West Scotian Slope.
By 3:30 p.m. ADT today trough located from the Gulf of St. Lawrence
to East Scotian Slope.

At 3:00 a.m. ADT Thursday trough located from Newfoundland to
Laurentian Fan.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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