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Northumberland Strait

Warnings

Forecast

Marine Forecast

Issued 10:00 AM ADT 18 June 2026

Today Tonight and Friday.

Strong wind warning in effect.

Wind light increasing to southeast 15 knots early this evening and to southeast 25 late overnight. Wind diminishing to southeast 15 to 20 Friday morning then becoming southwest 15 Friday afternoon.

Periods of rain and fog patches overnight and Friday. Risk of thunderstorms Friday afternoon and evening.

Extended Forecast

Issued 03:00 AM ADT 18 June 2026
Saturday Wind variable 10 to 15 knots increasing to northerly 15 to 20 in the afternoon.
Sunday Wind northeast 15 to 20 knots diminishing to light.
Monday Wind light.

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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 - Quai de St-Jean 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 19 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Northumberland Strait

Issued 10:00 AM ADT 18 June 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.

Synopsis

Technical Marine Synopsis

Issued 10:00 AM ADT 18 June 2026 Today Tonight and Friday At 10:00 a.m. ADT today low 1010 mb located over West Scotian Slope.
By 3:30 p.m. ADT today dissipating low 1010 mb located over East
Scotian Slope.

At 8:00 p.m. ADT tonight low 991 mb located near the Great Lakes.
By 8:00 p.m. ADT Friday low 994 mb located over New Brunswick.

St. Lawrence - St. Lawrence River Area

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