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Gulf - Magdalen

Warnings

Forecast

Marine Forecast

Issued 10:00 AM ADT 18 April 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind easterly 15 knots increasing to southeast 20 this afternoon and to southeast 25 to 30 near midnight with gusts to 45 from Margaree Harbour to Bay St. Lawrence. Wind southeast 25 to 30 with gusts to 45 from Margaree Harbour to Bay St. Lawrence Sunday.

Showers Sunday. Fog patches forming Sunday morning.

Temperatures minus 1 rising to plus 6 Sunday evening.

Waves

Issued 05:00 AM ADT 18 April 2026

Gulf - Magdalen - northern half

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

Gulf - Magdalen - southern half

Today Tonight and Sunday. Seas 1 metre or less building to 1 to 2 near midnight.

Extended Forecast

Issued 10:42 AM ADT 18 April 2026
Monday Wind south 25 knots becoming northwest 25 in the morning.
Tuesday Wind northwest 15 knots diminishing to light.
Wednesday Wind variable 10 to 15 knots.

Ice Forecast

Issued 10:00 AM EDT 18 April 2026 Today Tonight and Sunday Open water. Consolidated rotten first-year ice along parts of the coasts. 

[ 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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land station Land Station
Ice Conditions

Ice Forecasts

Issued 10:00 AM EDT 18 April 2026 Today Tonight and Sunday

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 4838N 6811W to 5005N
6600W to 4945N 6015W to Newfoundland near 4806N 5905W. Sea ice north
of the ice edge.

Ice Coverage

Open water. Consolidated rotten first-year ice along parts of the
coasts.

 

Iceberg Bulletin

Issued 2:40 PM EDT 17 April 2026

Iceberg Limit

Iceberg limit at 0000 UTC 18 Apr estimated from Newfoundland near
4655N 5400W to 4500N 5200W to 4440N 4710W 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

Issued 10:00 AM ADT 18 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 10:00 AM ADT 18 April 2026 Today Tonight and Sunday At 10:00 a.m. ADT today low 1012 mb located southwest of Georges
Bank.
By 3:00 a.m. ADT Sunday dissipating low located near Browns Bank.

At 10:00 a.m. ADT today ridge located over the northern Marine
District.
By 8:00 p.m. ADT tonight ridge located east of the Avalon Peninsula.

At 10:00 a.m. ADT Sunday trough located from Quebec to New England.
By 8:00 p.m. ADT Sunday trough located from Labrador to the Gulf
of Maine.

Marine Weather Statement

Issued 9:47 AM ADT 18 April 2026 A trough of low pressure extending from a low over Northern Quebec
will slowly approach the marine district tonight and Saturday.
Increasing southerly winds will reach strong to gale force across the
region ahead of the trough on Sunday.

Marine interests are advised that a gale warning is in effect for
Cabot Strait - northern half.

St. Lawrence - St. Lawrence River Area

Another Region

Marine Weather for Canada

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