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Northumberland Strait

Forecast

Marine Forecast

Issued 03:00 AM ADT 19 April 2026

Today Tonight and Monday.

Strong wind warning in effect.

Wind southeast 20 to 25 knots diminishing to light near midnight then increasing to northwest 20 overnight. Wind diminishing to light near noon Monday then becoming northeast 15 Monday evening.

Showers beginning early this morning changing to rain near midnight and ending Monday morning. Fog patches forming early this morning and dissipating Monday morning.

Extended Forecast

Issued 03:00 AM ADT 19 April 2026
Tuesday Wind north 15 knots.
Wednesday Wind light becoming northwest 15 knots late in the day.
Thursday Wind westerly 15 knots.

Ice Forecast

Issued 10:00 AM EDT 18 April 2026 Today Tonight and Sunday Open water except 1 tenth first-year ice near parts of the Prince Edward Island coast. Consolidated rotten first-year ice along parts of the Prince Edward Island coast. 

[ 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 18 April 2026 Today Tonight and Sunday

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 4838N 6811W to 5005N
6600W to 4945N 6015W to Newfoundland near 4806N 5905W. Sea ice north
of the ice edge.

Ice Coverage

Open water except 1 tenth first-year ice near parts of the Prince
Edward Island coast. Consolidated rotten first-year ice along parts
of the Prince Edward Island coast.

Warnings

Warnings (In effect)

Strong wind warning in effect

Northumberland Strait

Issued 03:00 AM ADT 19 April 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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 19 April 2026 Today Tonight and Monday At 10:00 a.m. ADT today trough located from Quebec to New England.
By 8:00 p.m. ADT Monday trough located from Newfoundland to
Laurentian Fan.

At 8:00 p.m. ADT Monday ridge located over the western Marine
District.

Marine Weather Statement

Issued 2:52 AM ADT 19 April 2026 A trough of low pressure extending from a low over Northern Quebec
will approach the marine district today then track across the
district tonight and Monday. Strong to gale southerly winds ahead of
the trough shift to strong to gale force northwesterlies in its wake.

Marine interests are advised that a gale warning is in effect for
Cabot Strait - northern half and Anticosti - northwestern half.

St. Lawrence - St. Lawrence River Area

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