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Marine Forecast

Issued 03:00 AM AST 05 December 2025

Today Tonight and Saturday.

Gale warning in effect.

Wind northwest 40 knots diminishing to northwest 25 early this morning and to northwest 15 near noon. Wind backing to southwest 15 this evening then diminishing to light overnight. Wind becoming south 10 to 15 Saturday evening.

Flurries ending early this morning. Visibility 1 mile or less in flurries.

Freezing spray warning in effect.

Freezing spray ending this morning.

Temperatures minus 5 rising to plus 5 Saturday evening.

Waves

Issued 05:00 AM AST 05 December 2025
Today Tonight and Saturday. Seas 3 to 5 metres subsiding to 2 to 3 this morning and to 1 to 2 this afternoon. Seas subsiding to 1 or less Saturday morning then building to 1 to 2 Saturday evening.

Extended Forecast

Issued 03:00 AM AST 05 December 2025
Sunday Wind southerly 20 knots becoming northwest 15 to 20 in the morning.
Monday Wind north 15 knots increasing to northwest 25.
Tuesday Wind north 15 knots increasing to southwest 20 late in the day.

Ice Forecast

Issued 10:00 AM EST 4 December 2025 Today Tonight and Friday Ice free. 

[ Canadian Ice Service ]

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Weather Conditions

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Montréal Metropolitain Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts 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 Miscou Island Kouchibouguac La Pocatière
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Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 4 December 2025 Today Tonight and Friday

Ice Edge

Ice edge estimated from Gaspe Peninsula near 4856N 6712W to 4956N
6635W to 4958N 6014W to Quebec near 5125N 5737W. Sea ice north of
the ice edge.

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Gale warning in effect

Lurcher

Issued 03:00 AM AST 05 December 2025

'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

Lurcher

Issued 03:00 AM AST 05 December 2025

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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM AST 5 December 2025 Today Tonight and Saturday At 3:00 a.m. AST today departing trough located from Newfoundland
to Banquereau.

At 10:00 a.m. AST today intensifying low 976 mb located over
eastern Newfoundland.
By 10:00 a.m. AST Saturday low 955 mb located east of Newfoundland.

At 3:30 p.m. AST today ridge located west of the Marine District.
By 3:30 p.m. AST Saturday ridge located over the central Marine
District.

Marine Weather Statement

Issued 2:37 AM AST 5 December 2025 An intensifying trough of low pressure extending from Labrador to
Browns Bank will move eastward to lie east of the marine district by
Friday morning. Gale to storm force northwesterlies will develop in
the wake of the trough.

Marine interests are advised that storm warnings are in effect for
Banquereau, Cabot Strait, Gulf-Magdalen - northeastern half, and
Anticosti - southeastern half. Gale warnings are in effect for all
remaining waters.

Marine interests are also advised that freezing spray warnings are in
effect for all waters except Georges Bank, West Scotian Slope, East
Scotian Slope, and Laurentian Fan.

St. Lawrence - St. Lawrence River Area

Another Region

Marine Weather for Canada

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