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Gulf - Magdalen - western half

Warnings

Forecast

Marine Forecast

Issued 03:30 PM ADT 20 April 2026

Tonight and Tuesday.

Strong wind warning in effect.

Wind west 25 knots diminishing to variable 10 to 15 early this evening and to light early Tuesday morning.

Temperatures near minus 1.

Waves

Issued 05:00 AM ADT 20 April 2026

Gulf - Magdalen - northern half

Today Tonight and Tuesday. Seas 1 to 2 metres subsiding to 1 or less Tuesday morning.

Gulf - Magdalen - southern half

Today Tonight and Tuesday. Seas 1 to 2 metres.

Extended Forecast

Issued 03:30 PM ADT 20 April 2026
Wednesday Wind northwest 15 knots diminishing to light in the afternoon.
Thursday Wind light becoming northwest 15 knots late in the day.
Friday Wind north 20 knots.

Ice Forecast

Issued 10:00 AM EDT 20 April 2026 Today Tonight and Tuesday Open water except 1 tenth first-year ice along parts of the Magdalen Islands coast. 

[ Canadian Ice Service ]

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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 20 April 2026 Today Tonight and Tuesday

Ice Edge

First ice edge estimated from Cape Breton Island near 4702N 6025W to
4745N 6115W to Gaspe Peninsula near 4846N 6410W. Sea ice southwest
of the ice edge.

Second ice edge estimated from Quebec near 4920N 6722W to 5005N
6600W to 4945N 6015W to Newfoundland near 4806N 5905W. Sea ice north
of the ice edge.

Ice Coverage

Open water except 1 tenth first-year ice along parts of the Magdalen
Islands coast.

 

Iceberg Bulletin

Issued 2:30 PM EDT 20 April 2026

Iceberg Limit

Iceberg limit at 0000 UTC 21 Apr estimated from Newfoundland near
4655N 5400W to 4415N 5210W to 4340N 4630W to 4630N 4415W to 5000N
4425W to 5305N 4755W to 5900N 5500W to 6015N 5245W to 5830N 5000W
then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Strong wind warning in effect

Gulf - Magdalen - western half

Issued 3:30 PM ADT 20 April 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 3:30 PM ADT 20 April 2026 Tonight and Tuesday At 3:30 p.m. ADT today trough located from Labrador to Laurentian
Fan.
By 8:00 p.m. ADT tonight departing trough located east of the
Marine District.

At 8:00 p.m. ADT tonight building ridge located over the western
Marine District.
By 8:00 p.m. ADT Tuesday ridge located over the Maritimes.

Marine Weather Statement

Issued 3:19 PM ADT 20 April 2026 A trough of low pressure located from Labrador to Laurentian Fan this
afternoon will continue to track eastward to lie east of the marine
district by this evening. Strong to gale force northwesterlies in its
wake will ease this evening.

Marine interests are advised that a gale warning is in effect for
Anticosti - southwestern half.

St. Lawrence - St. Lawrence River Area

Another Region

Marine Weather for Canada

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