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L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 13 July 2025

Today Tonight and Monday.

Wind light becoming southwest 15 knots early this afternoon. Wind southwest 15 tonight and Monday.

Showers tonight with a risk of thunderstorms. Visibility as low as 1 mile in showers.

Waves

Issued 03:00 AM EDT 13 July 2025
Today Tonight and Monday. Seas 1 metre or less.

Extended Forecast

Issued 06:00 AM EDT 13 July 2025
Tuesday Wind southwest 10 to 15 knots diminishing to light late in the day.
Wednesday Wind light becoming southwest 10 to 15 knots.
Thursday Wind light.

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Saint-Hubert Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts 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 Miscou Island Kouchibouguac La Pocatière
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Ice Conditions

There is no ice forecast issued for this area.

Warnings

Watches (In effect)

Squall watch in effect

L'Isle-aux-Coudres to Tadoussac

Issued 09:23 AM EDT 13 July 2025 This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 50 knots, frequent lightning and poor to very poor visibilities caused by thunderstorms at times heavy.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Delay travel or if underway, reduce speed or return to port if safe to do so.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 13 July 2025 Today Tonight and Monday At 3:00 a.m. EDT today high located over Nova Scotia.
By noon EDT Monday departing high located off Nova Scotia.

At 3:00 a.m. EDT today low 995 mb located over northern Ontario.
By noon EDT Monday low 985 mb located over the Ungava Peninsula.

At 3:00 a.m. EDT Tuesday approaching ridge located over eastern
Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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