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L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 11 December 2025

Tonight and Friday.

Gale warning in effect.

Wind southwest 15 to 25 knots increasing to southwest 25 to 35 late this afternoon then becoming westerly 20 to 30 this evening. Wind diminishing to westerly 15 Friday evening.

Snow ending Friday afternoon. Visibility 1 mile or less in snow.

Over open water risk of freezing spray tonight and Friday.

Temperatures near minus 6.

Waves

Issued 03:00 PM EST 11 December 2025
Tonight and Friday. Over open water seas 1 metre or less building to 1 to 2 early this evening then subsiding to 1 or less Friday evening.

Extended Forecast

Issued 06:00 PM EST 11 December 2025
Saturday Wind southwest 15 knots diminishing to light in the morning.
Sunday Wind light.
Monday Wind northwest 15 knots.

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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 6:49 PM EST 11 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 PM EST 11 December 2025 Tonight and Friday At 3:00 p.m. EST today low 980 mb located over Anticosti Island.
By 7:00 p.m. EST Friday low 972 mb located over Labrador Sea.

At 7:00 a.m. EST Friday ridge located on a line north-south over
Lake Superior.
By 7:00 p.m. EST Friday ridge located on a line north-south over
Lake Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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