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Northumberland Strait - western half

Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 17 March 2026

Today Tonight and Wednesday.

Gale warning in effect.

Wind southeast 25 knots increasing to south 40 this morning then diminishing to southwesterly 25 this evening. Wind veering to northwesterly 25 overnight then backing to west 15 to 20 Wednesday afternoon. Wind diminishing to light Wednesday evening.

Periods of rain ending this afternoon. Scattered flurries overnight and Wednesday. Fog patches dissipating this evening.

Freezing spray warning in effect.

Over open water freezing spray Wednesday morning and afternoon.

Temperatures plus 7 falling to minus 5 Wednesday morning.

Extended Forecast

Issued 03:00 AM ADT 17 March 2026
Thursday Wind southerly 10 to 15 knots.
Friday Wind southwesterly 10 to 15 knots.
Saturday Wind northwest 20 knots diminishing to light.

Ice Forecast

Issued 10:00 AM EDT 16 March 2026 Today Tonight and Tuesday Ice pressure warning in effect. 3 tenths first-year ice except 7 tenths first-year ice in the eastern section. Consolidated first-year ice along parts of the coasts. Strong ice pressure along parts of the Prince Edward Island coast developing overnight. 

[ Canadian Ice Service ]

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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 16 March 2026 Today Tonight and Tuesday

Ice Edge

Ice edge estimated from Nova Scotia near 4437N 6325W to 4419N 6258W
to 4602N 5807W to Newfoundland near 4740N 5814W. Sea ice north of
the ice edge.

Ice Coverage

Ice pressure warning in effect.

3 tenths first-year ice except 7 tenths first-year ice in the
eastern section. Consolidated first-year ice along parts of the
coasts.
Strong ice pressure along parts of the Prince Edward Island coast
developing overnight.

Warnings

Warnings (In effect)

Gale warning in effect

Northumberland Strait

Issued 03:00 AM ADT 17 March 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.

Freezing spray warning in effect

Northumberland Strait

Issued 03:00 AM ADT 17 March 2026

Moderate or severe freezing spray is 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.

Ice pressure warning in effect

Northumberland Strait - western half

Issued 10:00 AM EDT 16 March 2026

Navigators in this marine area should be on the lookout for hazardous ice conditions and take necessary safety precautions. Please refer to the latest ice forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 17 March 2026 Today Tonight and Wednesday At 3:00 a.m. ADT today trough located over New England.
By 3:30 p.m. ADT today trough located from the Gulf of St. Lawrence
to West Scotian Slope.

At 10:00 a.m. ADT Wednesday departing trough located southeast of
Laurentian Fan.

At 3:30 p.m. ADT Wednesday building high located southwest of the
Marine District.

Marine Weather Statement

Issued 2:48 AM ADT 17 March 2026 An intense trough of low pressure will cross the district today and
tonight to lie southeast of Laurentian Fan Wednesday morning. Gale to
near storm force southerlies ahead of the trough shift to strong to
gale force westerlies in its wake. Winds will diminish over all
waters during the day Wednesday as an area of high pressure builds in
from the west.

Marine interests are advised that gale warnings are in effect for all
waters. Freezing spray warnings are in effect for Fundy, Grand Manan,
Cabot Strait and all Gulf of St. Lawrence waters.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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