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L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EST 09 December 2025

Tonight and Wednesday.

Gale warning in effect.

Wind southwest 25 to 35 knots diminishing to southwest 15 to 25 early this evening then becoming southwest 15 near midnight. Wind diminishing to light near noon Wednesday then becoming northeast 15 Wednesday evening.

Snow Wednesday late in the day. Visibility 1 mile or less in snow.

Risk of freezing spray late this afternoon and this evening.

Low tonight minus 9. High Wednesday minus 4.

Waves

Issued 03:00 PM EST 09 December 2025
Tonight and Wednesday. Seas 1 to 2 metres subsiding to 1 or less near midnight.

Extended Forecast

Issued 06:00 AM EST 09 December 2025
Thursday Wind northeast 15 to 25 knots becoming northwest 15 late in the day.
Friday Wind westerly 15 to 25 knots.
Saturday Wind southwest 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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buoy Buoy
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 3:00 PM EST 09 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 9 December 2025 Tonight and Wednesday At 3:00 p.m. EST today ridge located on a line north-south over
Saguenay River.
By 7:00 p.m. EST Wednesday ridge located on a line
northwest-southeast over Anticosti Island.

At 3:00 p.m. EST today low 999 mb located near Lake Superior.
By 7:00 p.m. EST Wednesday low 989 mb located over Lake Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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