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Northumberland Strait

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 08 March 2026

Today Tonight and Monday.

Wind southwest 25 knots diminishing to southwest 15 to 20 early this evening and to southwest 10 to 15 near midnight. Wind increasing to southwest 15 to 20 Monday morning then backing to south 25 Monday evening.

Scattered showers ending near midnight. Risk of thunderstorms this morning. Fog patches dissipating overnight.

Temperatures plus 4 falling to minus 1 near midnight then rising to plus 4 Monday evening.

Extended Forecast

Issued 03:00 AM ADT 08 March 2026
Tuesday Wind southwesterly 20 knots diminishing to variable 10 to 15 in the afternoon.
Wednesday Wind northeast 20 to 25 knots.
Thursday Wind southeasterly 25 to 30 knots veering to southwest 25 to 30.

Ice Forecast

Issued 10:00 AM EST 7 March 2026 Today Tonight and Sunday 9 tenths first-year ice. 

[ 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 EST 7 March 2026 Today Tonight and Sunday

Ice Edge

Ice edge estimated from 4420N 6720W to 4430N 6635W to 4330N 6615W to
4315N 6515W to 4549N 5807W to 4708N 5834W to 4630N 5615W to
Newfoundland near 4640N 5530W. Sea ice north of the ice edge.

Ice Coverage

9 tenths first-year ice.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 8 March 2026 Today Tonight and Monday At 3:00 a.m. ADT today trough located over the St. Lawrence River.
By 8:00 p.m. ADT tonight departing trough located over Newfoundland.

At 8:00 p.m. ADT tonight trough located over Ontario.
By 8:00 p.m. ADT Monday approaching trough located over Quebec.

Marine Weather Statement

Issued 1:30 AM AST 8 March 2026 A trough of low pressure over the St. Lawrence River will track
eastward today reaching Newfoundland by this evening and the Labrador
Sea on Monday. Strong to gale force southwesterly winds ahead of the
trough will diminish in its wake.

Marine interests are advised that gale warnings are in effect for
Banquereau - northern half, Cabot Strait, Gulf-Magdalen -
northeastern half and Anticosti - southeastern half.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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