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Anticosti

Warnings

Forecast

Marine Forecast

Issued 08:00 PM ADT 04 September 2026

Tonight and Saturday.

Strong wind warning in effect.

Wind easterly 20 knots increasing to northeast 30 late overnight except variable 15 over northwestern sections Saturday afternoon and evening.

Showers ending Saturday morning. Fog patches dissipating late overnight.

Waves

Issued 05:00 PM ADT 04 September 2026

Anticosti - northwestern half

Tonight and Saturday. Seas 1 to 2 metres building to 2 to 3 early Saturday morning.

Anticosti - southeastern half

Tonight and Saturday. Seas 1 to 2 metres building to 2 to 3 early Saturday morning and to 3 to 4 near noon Saturday.

Extended Forecast

Issued 03:30 PM ADT 04 September 2026
Sunday Wind northeast 25 knots.
Monday Wind northeast 25 knots backing to northwest 20.
Tuesday Wind northwest 20 knots increasing to north 30.

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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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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 4 September 2026

Iceberg Limit

Iceberg limit at 0000 UTC 5 Sep estimated from Newfoundland near
4910N 5455W to 5400N 5345W to 6000N 5600W to 6130N 5420W to 5900N
4610W then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Strong wind warning in effect

Anticosti

Issued 8:00 PM ADT 04 September 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 8:00 PM ADT 4 September 2026 Tonight and Saturday At 8:00 p.m. ADT tonight intensifying low 1002 mb located over
Eastern Shore.
By 3:00 a.m. ADT Saturday low 998 mb located over Eastern Shore.

At 8:00 p.m. ADT Saturday quasi-stationary low 996 mb located over
southern Banquereau.

Marine Weather Statement

Issued 3:14 PM ADT 4 September 2026 A low pressure system over southwestern shore continues to intensify
and move slowly eastward today. Overnight this low is expected to lie
over eastern shore. The low will then stall over Southern Banquereau
Saturday evening.

Winds will increase to strong to gale force easterlies or
northeasterlies over northern and eastern marine areas. Over western
waters, winds will increase to strong northerlies on Saturday in the
wake of the low.

Marine interests are advised that gale warnings are in effect for
eastern shore, Sable, East Scotian Slope - western half, Fourchu,
Banquereau, Cabot Strait, Northumberland Strait and Gulf-Magdalen.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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