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Anticosti

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 12 April 2026

Today Tonight and Monday.

Gale warning in effect.

Wind northerly 35 knots diminishing to northwest 25 to 30 this morning and to northwest 15 early this evening. Wind diminishing to light near midnight then increasing to southeast 25 Monday morning. Wind veering to south 30 Monday afternoon then diminishing to south 20 Monday evening.

Scattered flurries ending this morning. Showers or flurries Monday afternoon and evening. Mist forming Monday evening. Visibility 1 mile or less in precipitation and in mist.

Temperatures near minus 1.

Waves

Issued 05:00 AM ADT 12 April 2026

Anticosti - northwestern half

Today Tonight and Monday. Seas 1 to 2 metres subsiding to 1 or less early this evening then building to 1 to 2 Monday morning.

Anticosti - southeastern half

Today Tonight and Monday. Seas 3 to 4 metres subsiding to 2 to 3 this afternoon and to 1 to 2 early this evening.

Extended Forecast

Issued 03:00 AM ADT 12 April 2026
Tuesday Wind northwest 10 to 15 knots.
Wednesday Wind northeast 15 knots veering to southeast 15.
Thursday Wind south 25 knots.

Ice Forecast

Issued 10:00 AM EDT 11 April 2026 Today Tonight and Sunday Open water. Consolidated rotten first-year ice in a few sheltered bays. 

[ Canadian Ice Service ]

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Weather Conditions

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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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Ice Conditions

Ice Forecasts

Issued 10:00 AM EDT 11 April 2026 Today Tonight and Sunday

Ice Edge

Ice edge estimated from Cape Breton Island near 4607N 5949W to 4606N
5926W to 4712N 5933W to Newfoundland near 4753N 5924W. Sea ice west
of the ice edge.

Ice Coverage

Open water. Consolidated rotten first-year ice in a few sheltered
bays.

 

Iceberg Bulletin

Issued 2:30 PM EDT 11 April 2026

Iceberg Limit

Iceberg limit at 0000 UTC 12 Apr estimated from Newfoundland near
4655N 5400W to 4510N 5245W to 4505N 4650W to 4620N 4255W to 5000N
4425W to 5305N 4755W to 5900N 5600W to 6015N 5245W to 5735N 4735W
then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Gale warning in effect

Anticosti

Issued 03:00 AM ADT 12 April 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 ADT 12 April 2026 Today Tonight and Monday At 3:00 a.m. ADT today departing low 1004 mb located over western
Newfoundland.

At 3:30 p.m. ADT today approaching ridge located west of the
Marine District.

At 8:00 p.m. ADT Monday approaching low 1000 mb located near the
St. Lawrence River.

Marine Weather Statement

Issued 2:33 AM ADT 12 April 2026 A low pressure system over Western Newfoundland will continue to pull
away from the marine district with a building ridge behind. Strong to
gale force northwesterlies will continue over eastern waters today in
the wake of the low.

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

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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