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Northumberland Strait

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 12 October 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind southwest 30 knots becoming northeast 30 near noon then diminishing to north 20 overnight. Wind diminishing to north 15 Tuesday morning and to light Tuesday afternoon.

Showers this afternoon and this evening.

Extended Forecast

Issued 03:00 AM ADT 12 October 2026
Wednesday Wind southeast 15 to 20 knots increasing to southeast 30 in the afternoon then diminishing to variable 15 late in the day.
Thursday Wind northwest 30 knots.
Friday Wind northwest 15 to 20 knots diminishing to light.

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Map of St. Lawrence - St. Lawrence River marine weather areas Grand Manan New Carlisle Pointe-au-Père Fundy Park (Alma) Port Menier Miramichi Île Bicquette Charlo Cap-Chat Bathurst Airport CFB Bagotville Jonquière Mistook Normandin Roberval Airport Île-d'Orléans - Quai de St-Jean Deschambault North Bay Airport Beauport L'Isle-aux-Grues Bas Caraquet Lake Nipissing - 45152 Pointe-des-Monts L'Assomption Baie-Comeau Airport Saint-Anicet Cap-Rouge Sainte-Anne-de-Bellevue Lac Memphrémagog Montréal Metropolitain Airport Île Rouge Montréal-Trudeau Int'l Airport Lac Saint-Pierre Trois-Rivières Airport Pointe de l'Islet Pointe Claveau Sept-Îles Airport Kouchibouguac North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport La Pocatière Miscou Island Mont-Joli Airport
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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 03:00 AM ADT 12 October 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 3:00 AM ADT 12 October 2026 Today Tonight and Tuesday At 3:00 a.m. ADT today low 1001 mb located north of the Gaspe
Peninsula.
By 3:30 p.m. ADT today departing low 995 mb located east of
Newfoundland.

At 3:00 a.m. ADT today low 1000 mb located near Long Island.
By 8:00 p.m. ADT tonight low 992 mb located over Laurentian Fan.

At 3:00 a.m. ADT today high 1025 mb located over Quebec.
By 3:30 p.m. ADT Tuesday high 1022 mb located over the Gaspe
Peninsula.

Marine Weather Statement

Issued 2:47 AM ADT 12 October 2026 A low pressure system will track across the southern slope waters
today. Strong to gale force southerlies will switch to strong to gale
force northeasterlies in its wake on Tuesday and as a ridge moves in
from the northwest.

Marine interests are advised that gale warnings are in effect for
Georges Bank - southern half, West Scotian Slope - southern half,
eastern shore - eastern half, Sable - eastern half, East Scotian
Slope, Fourchu, Banquereau, Laurentian Fan, and Cabot Strait.

Outlook for the start-up of the Upper Bay of Fundy lobster fishery.

Monday...Winds southwest 25 knots diminishing to light mid-day and
then to northeast 25 in the evening. Choppy sea conditions in the
evening when winds will be running against the rising tide.
Tuesday...Winds northeast 30 knots diminishing to northeast 15 to 20
knots in the morning then to east 10 to 15 knots near noon then
increasing to southeast 15 near midnight. Choppy sea conditions in
the morning when winds will run against the rising tide.
Wednesday...Winds southeast 15 knots increasing to 25 knots in the
morning then becoming westerly 20 to 25 knots in the afternoon then
to northwest 25 late in the evening. Choppy sea conditions late in
the day when winds will be running against the ebbing tide.

St. Lawrence - St. Lawrence River Area

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