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L'Isle-aux-Coudres to Tadoussac

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 11 March 2026

Today Tonight and Thursday.

Gale warning in effect.

Wind northeast 15 to 25 knots increasing to northeast 25 to 35 near noon then diminishing to northeast 15 to 25 Thursday morning. Wind increasing to southwest 30 to 40 near noon Thursday then diminishing to west 15 to 25 Thursday afternoon.

Snow beginning this morning changing to freezing rain overnight then to periods of snow Thursday morning and ending near noon Thursday. Visibility 1 mile or less in snow.

Risk of freezing spray late this afternoon tonight and Thursday morning.

Temperatures near minus 4.

Waves

Issued 03:00 AM EDT 11 March 2026
Today Tonight and Thursday. Over open water seas 1 metre or less building to 1 to 2 this afternoon then subsiding to 1 or less Thursday morning.

Extended Forecast

Issued 06:00 AM EDT 11 March 2026
Friday Wind southwest 15 knots diminishing to light late in the day.
Saturday Wind northeast 20 to 30 knots.
Sunday Wind northwest 10 to 15 knots becoming light.

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Map of St. Lawrence - St. Lawrence River marine weather areas Miramichi North Cape Port Menier Roberval Airport Normandin Mistook Jonquière CFB Bagotville Cap-Chat Île Bicquette Charlo North Bay Airport Yarmouth Airport Brier Island St. Stephen Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac Kouchibouguac Grand Manan Fundy Park (Alma) Bas Caraquet Bathurst Airport Lac Saint-Pierre Pointe-Noire Île d'Orléans Pointe-des-Monts L'Assomption Sept-Îles Airport Pointe Claveau Pointe de l'Islet Trois-Rivières Airport L'Isle-aux-Grues Deschambault Île Rouge Montréal-Trudeau Int'l Airport Montréal Metropolitain Airport Lac Memphrémagog Sainte-Anne-de-Bellevue Cap-Rouge Saint-Anicet Baie-Comeau Airport La Pocatière Pointe-au-Père New Carlisle Mont-Joli Airport Gaspé Airport Lake Nipissing - 45152 Rivière-la-Madeleine Beauport Cap-d'Espoir
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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 EDT 11 March 2026

'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 EDT 11 March 2026 Today Tonight and Thursday At 3:00 a.m. EDT today high 1034 mb located over northern Quebec.
By 8:00 p.m. EDT tonight weakening high 1030 mb located over
Labrador.

At 3:00 a.m. EDT today low 1004 mb located over the Midwestern
states.
By 8:00 p.m. EDT Thursday low 990 mb located over the Gulf of
St. Lawrence.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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