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L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 15 December 2025

Today Tonight and Tuesday.

Gale warning in effect.

Wind northwest 15 knots increasing to southwest 15 to 25 Tuesday morning and to southwest 25 to 35 Tuesday evening.

Scattered flurries Tuesday. Visibility as low as 1 mile in flurries.

Over open water risk of freezing spray Tuesday afternoon and evening.

Temperatures minus 8 rising to minus 3 Tuesday evening.

Waves

Issued 03:00 AM EST 15 December 2025
Today Tonight and Tuesday. Over open water seas 1 metre or less building to 1 to 2 near noon Tuesday.

Extended Forecast

Issued 06:00 AM EST 15 December 2025
Wednesday Wind southwest 20 to 30 knots.
Thursday Wind light becoming northeast 15 knots.
Friday Wind southwest 15 knots increasing to west 15 to 25.

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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 Montréal Metropolitain 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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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Gale warning in effect

L'Isle-aux-Coudres to Tadoussac

Issued 03:00 AM EST 15 December 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 15 December 2025 Today Tonight and Tuesday At 3:00 a.m. EST today ridge located from Lake Erie to Ungava Bay.
By 7:00 p.m. EST Tuesday ridge located from Nova Scotia to Labrador.

At 3:00 a.m. EST today intensifying low 990 mb located off Nova
Scotia.
By 10:00 p.m. EST tonight departing low 947 mb located off
Newfoundland.

At 10:00 a.m. EST Tuesday trough located on a line
northeast-southwest over northwestern Ontario.
By 7:00 p.m. EST Tuesday trough located on a line
northeast-southwest over James Bay.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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