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Northumberland Strait - western half

Warnings

Forecast

Marine Forecast

Issued 08:00 PM ADT 12 April 2026

Tonight and Monday.

Wind northwest 15 knots diminishing to light this evening then increasing to south 15 early Monday morning. Wind increasing to south 25 near noon Monday then diminishing to south 15 early Monday evening.

Showers Monday afternoon and evening. Fog patches forming Monday evening.

Temperatures near plus 1.

Extended Forecast

Issued 03:30 PM ADT 12 April 2026
Tuesday Wind variable 10 to 15 knots.
Wednesday Wind light becoming southeast 15 knots.
Thursday Wind light.

Ice Forecast

Issued 10:00 AM EDT 12 April 2026 Today Tonight and Monday Open water except 1 tenth first-year ice in the southeastern section. 9 tenths first-year ice along parts of the Prince Edward Island coast. Consolidated rotten first-year ice along parts of the coasts. 

[ 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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Ice Conditions

Ice Forecasts

Issued 10:00 AM EDT 12 April 2026 Today Tonight and Monday

Ice Edge

Ice edge estimated from Cape Breton Island near 4607N 5949W to 4631N
5919W to 4844N 6156W to 4919N 6025W to Newfoundland near 4753N
5924W. Sea ice west then northeast of the ice edge.

Ice Coverage

Open water except 1 tenth first-year ice in the southeastern
section. 9 tenths first-year ice along parts of the Prince Edward
Island coast. Consolidated rotten first-year ice along parts of the
coasts.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 8:00 PM ADT 12 April 2026 Tonight and Monday At 8:00 p.m. ADT tonight departing low 991 mb located east of
Newfoundland.

At 8:00 p.m. ADT tonight ridge located west of the Marine District.
By 10:00 a.m. ADT Monday departing ridge located over the
southeastern Marine District.

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

Marine Weather Statement

Issued 7:36 PM ADT 12 April 2026 A low pressure system east of Newfoundland will pull away from the
marine district tonight. Strong to gale force northwesterlies over
eastern waters will diminish this evening.

Marine interests are advised that gale warnings are in effect for
Banquereau and Laurentian Fan.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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