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Pointe-des-Monts to Anticosti - southern half

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 12 August 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind westerly 15 to 25 knots becoming west 15 near midnight then increasing to southwest 15 to 25 Thursday evening.

Scattered showers ending this evening with a risk of thunderstorms. Scattered showers Thursday afternoon and evening.

Waves

Issued 03:00 PM EDT 12 August 2026
Tonight and Thursday. Seas 1 to 2 metres subsiding to 1 late overnight then building to 1 to 2 Thursday evening.

Extended Forecast

Issued 06:00 PM EDT 12 August 2026
Friday Wind southwest 15 to 25 knots becoming northwest 15 late in the day.
Saturday Wind northwest 15 knots increasing to southwest 20 to 30.
Sunday Wind southwest 20 knots.

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

Ice Forecasts

Issued 10:00 AM EDT 19 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Pointe-des-Monts to Anticosti - southern half

Issued 3:00 PM EDT 12 August 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 12 August 2026 Tonight and Thursday At 3:00 p.m. EDT today low 997 mb located over the Strait of
Belle Isle.
By 8:00 p.m. EDT tonight departing low 998 mb located over northern
Newfoundland.

At 8:00 p.m. EDT tonight trough located from the low to Saguenay
River.
By 8:00 p.m. EDT Thursday trough located from Labrador to New
Brunswick.

At 8:00 p.m. EDT Thursday approaching ridge located over
northwestern Ontario.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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