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Donnacona to Beauport

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 12 August 2026

Today Tonight and Thursday.

Wind light becoming west 10 to 15 knots near noon then becoming light this evening. Wind becoming west 10 to 15 Thursday morning then diminishing to light Thursday evening.

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

Extended Forecast

Issued 06:00 AM EDT 12 August 2026
Friday Wind light becoming northwest 10 to 15 knots in the morning.
Saturday Wind light.
Sunday Wind light.

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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

There is no ice forecast issued for this area.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 12 August 2026 Today Tonight and Thursday At 3:00 a.m. EDT today low 999 mb located over the Gulf of
St. Lawrence.
By 8:00 p.m. EDT tonight departing low 998 mb located over northern
Newfoundland.

At 8:00 p.m. EDT Thursday trough located from Labrador to Sept-Îles.

At 8:00 p.m. EDT Thursday approaching ridge located over
northwestern Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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