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Anticosti

Warnings

Forecast

Marine Forecast

Issued 10:00 AM ADT 21 May 2026

Today Tonight and Friday.

Gale warning in effect.

Wind northwesterly 35 knots with gusts to 45 in the Honguedo Strait. Wind diminishing to northwest 25 this afternoon then increasing to northwest 30 near noon Friday with gusts to 40 in the Honguedo Strait. Wind diminishing to northwest 20 to 25 Friday evening.

Waves

Issued 05:00 AM ADT 21 May 2026

Anticosti - northern half

Today Tonight and Friday. Seas 2 to 3 metres subsiding to 1 to 2 this morning then building to 2 to 3 Friday morning. Seas subsiding to 1 to 2 Friday evening.

Anticosti - southern half

Today Tonight and Friday. Seas 3 to 4 metres subsiding to 2 to 3 this morning then building to 3 to 4 Friday afternoon.

Extended Forecast

Issued 03:00 AM ADT 21 May 2026
Saturday Wind northwest 25 knots.
Sunday Wind westerly 15 knots.
Monday Wind southwest 15 knots backing to south 20.

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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

Ice Forecasts

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

Iceberg Bulletin

Issued 2:49 PM EDT 20 May 2026

Iceberg Limit

Iceberg limit at 0000 UTC 21 May estimated from Newfoundland near
4700N 5520W to 4350N 5000W to 4350N 4600W to 4845N 4335W to 5310N
4635W to 5550N 5010W to 5900N 5500W to 5955N 5310W to 5825N 4810W
then northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Gale warning in effect

Anticosti

Issued 10:00 AM ADT 21 May 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 10:00 AM ADT 21 May 2026 Today Tonight and Friday At 10:00 a.m. ADT today cold front located over the southern
Marine District.
By 3:30 p.m. ADT today departing cold front located southeast of
the Marine District.

At 3:30 p.m. ADT today ridge located over Ontario.
By 3:30 p.m. ADT Friday ridge located over the Gulf of Maine.

Marine Weather Statement

Issued 9:52 AM ADT 21 May 2026 Strong to gale force northwest winds over northern waters will
gradually diminish today in the wake of a cold front.

Marine interests are advised that gale warnings are in effect for
Cabot Strait - northern half, Gulf-Magdalen - northeastern half, and
Anticosti.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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