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Anticosti - eastern half

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 12 May 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind variable 10 to 15 knots becoming northwest 15 this afternoon then increasing to northwest 20 to 25 near midnight. Wind northwest 20 to 25 Wednesday.

Scattered showers tonight and Wednesday.

Waves

Issued 05:00 AM ADT 12 May 2026
Today Tonight and Wednesday. Seas 1 metre or less building to 1 to 2 late overnight.

Extended Forecast

Issued 03:00 AM ADT 12 May 2026
Thursday Wind west 20 knots backing to southerly 15 in the morning.
Friday Wind southerly 15 knots.
Saturday Wind variable 10 to 15 knots.

Ice Forecast

Issued 10:00 AM EDT 11 May 2026 Today Tonight and Tuesday Open water. 

[ 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 May 2026 Today Tonight and Tuesday

Ice Edge

Ice edge estimated from Quebec near 5016N 6251W to 4956N 6207W to
4956N 5959W to 5116N 5738W to Quebec near 5125N 5736W. Sea ice north
of the ice edge.

Ice Coverage

Open water.

 

Iceberg Bulletin

Issued 2:49 PM EDT 11 May 2026

Iceberg Limit

Iceberg limit at 0000 UTC 12 May estimated from Newfoundland near
4655N 5545W to 4125N 5045W to 4135N 4645W to 4735N 4420W to 5310N
4705W to 5550N 5010W to 5900N 5500W then eastward.

Iceberg Count

No confirmed icebergs except less than 10 icebergs northeast of the
western iceberg limit.
Warnings

Warnings (In effect)

Strong wind warning in effect

Anticosti - eastern half

Issued 03:00 AM ADT 12 May 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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 12 May 2026 Today Tonight and Wednesday At 3:00 a.m. ADT today deepening low 1008 mb located over East
Scotian Slope.
By 3:30 p.m. ADT today low 1002 mb located over northern Banquereau.

At 3:30 p.m. ADT Wednesday departing low 988 mb located north
of Newfoundland.

At 8:00 p.m. ADT tonight ridge located west of the Marine District.
By 8:00 p.m. ADT Wednesday ridge located from the Gaspe Peninsula
to West Scotian Slope.

Marine Weather Statement

Issued 2:47 AM ADT 12 May 2026 A developing low pressure system over East Scotian Slope this morning
will move north to lie over Northern Banquereau by this afternoon.
Strong to gale force west to northwesterlies will develop later this
evening in the wake of the low.

Marine interests are advised that gale warnings are in effect for
Cabot Strait and Banquereau.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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