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Anticosti

Warnings

Forecast

Marine Forecast

Issued 10:00 AM ADT 11 August 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind light becoming variable 10 to 15 knots this afternoon then becoming northwest 15 late overnight. Wind increasing to northwest 20 to 25 Wednesday morning.

Showers this afternoon tonight and Wednesday. Risk of thunderstorms late this afternoon and this evening. Fog patches forming this afternoon and dissipating Wednesday morning.

Waves

Issued 05:00 AM ADT 11 August 2026
Today Tonight and Wednesday. Seas 1 metre or less building to 1 to 2 Wednesday morning.

Extended Forecast

Issued 03:00 AM ADT 11 August 2026
Thursday Wind west 15 to 20 knots.
Friday Wind light increasing to north 20 to 25 knots.
Saturday Wind northwest 20 to 25 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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land station Land Station
Ice Conditions

Ice Forecasts

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

Iceberg Bulletin

Issued 2:30 PM EDT 11 August 2026

Iceberg Limit

Iceberg limit at 0000 UTC 12 Aug estimated from Newfoundland near
4825N 5310W to 4840N 5220W to 5010N 5100W to 5800N 5300W to 6020N
5200W then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Strong wind warning in effect

Anticosti

Issued 1:50 PM ADT 11 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 10:00 AM ADT 11 August 2026 Today Tonight and Wednesday At 10:00 a.m. ADT today trough located over New Brunswick.
By 8:00 p.m. ADT tonight trough located from the Gulf of
St. Lawrence to East Scotian Slope.

At 8:00 p.m. ADT Wednesday departing trough located over the
Grand Banks.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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