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Northumberland Strait

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 22 April 2026

Today Tonight and Thursday.

Wind light becoming variable 10 to 15 knots this afternoon. Wind variable 10 to 15 tonight and Thursday.

Scattered flurries overnight and Thursday morning.

Temperatures near minus 1.

Extended Forecast

Issued 03:00 AM ADT 22 April 2026
Friday Wind light increasing to northerly 20 knots in the afternoon.
Saturday Wind northerly 20 knots.
Sunday Wind north 10 to 15 knots.

Ice Forecast

Issued 10:00 AM EDT 21 April 2026 Today Tonight and Wednesday 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 21 April 2026 Today Tonight and Wednesday

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
6558W to 4841N 6158W to 4957N 6006W to 4935N 5822W to 4836N 5937W to
Newfoundland near 4806N 5905W. Sea ice north of the ice edge.

Ice Coverage

Open water.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 22 April 2026 Today Tonight and Thursday At 3:00 a.m. ADT today low 1004 mb located southeast of Laurentian
Fan.
By 3:00 a.m. ADT Thursday low 1000 mb located northeast of
Newfoundland.

At 3:00 a.m. ADT today ridge located from Anticosti Island to
Georges Bank.
By 3:00 a.m. ADT Thursday ridge located from Anticosti Island to
East Scotian Slope.

At 8:00 p.m. ADT Thursday approaching low 991 mb located south of
Laurentian Fan.

Marine Weather Statement

Issued 2:23 AM ADT 22 April 2026 A low pressure system southeast of Laurentian Fan will move northward
to lie north of Newfoundland tonight then stall and weaken on
Thursday. Strong to gale force northerlies or northwesterlies over
eastern waters will gradually diminish as the low moves northward and
weakens.

Late on Thursday, another low will intensify and approach
southeastern waters. Strong to possibly gale force northeasterlies
are likely over East Scotian Slope and Laurentian Fan Thursday
evening.

Marine interests are advised that a gale warning is in effect for
Laurentian Fan - southeastern half.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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