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Marine Forecast

Issued 03:30 PM AST 13 December 2025

Tonight and Sunday.

Wind southwest 10 to 15 knots increasing to southwest 20 early this evening then veering to west 15 late overnight. Wind diminishing to light early Sunday morning then increasing to northeast 15 Sunday afternoon. Wind increasing to north 30 Sunday evening.

Periods of rain or snow beginning this evening becoming snow Sunday evening. Visibility 1 mile or less in snow.

Waves

Issued 05:00 AM AST 13 December 2025
Today Tonight and Sunday. Seas 3 to 5 metres subsiding to 2 to 3 late this morning and to 1 to 2 early this evening. Seas building to 3 Sunday evening.

Extended Forecast

Issued 03:30 PM AST 13 December 2025
Monday Wind northwest 35 knots.
Tuesday Wind northwest 25 knots diminishing to west 15.
Wednesday Wind southwest 25 knots.

Ice Forecast

Issued 10:00 AM EST 13 December 2025 Today Tonight and Sunday Ice free. 

[ Canadian Ice Service ]

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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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land station Land Station
Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 13 December 2025 Today Tonight and Sunday

Ice Edge

First ice edge estimated from 4723N 6136W to 4738N 6112W to 4744N
6124W to 4734N 6159W to 4706N 6212W to 4706N 6147W to 4723N 6136W.
Sea ice within the ice edge.

Second ice edge estimated from Nova Scotia near 4551N 6201W to
Prince Edward Island near 4621N 6211W. Sea ice west of the ice edge.

Third ice edge estimated from Prince Edward Island near 4628N 6231W
to 4640N 6329W to 4736N 6409W to 4904N 6404W to 4925N 6516W to 4916N
6703W to 4956N 6635W to Anticosti Island near 4924N 6336W. Sea ice
west then north of the ice edge.

Fourth ice edge estimated from Anticosti Island near 4945N 6301W to
4946N 5954W to 5106N 5804W to Newfoundland near 5029N 5728W. Sea ice
north of the ice edge.

Ice Coverage

Ice free.

 

Iceberg Bulletin

Issued 1:30 PM EST 13 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 14 Dec estimated from Newfoundland near
4730N 5239W to 4730N 5000W to 5130N 4815W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:30 PM AST 13 December 2025 Tonight and Sunday At 3:30 p.m. AST today ridge located from Quebec to the Gulf
of Maine.
By 3:30 p.m. AST Sunday ridge located from the Gulf of St. Lawrence
to the Grand Banks.

At 3:30 p.m. AST Sunday low 1003 mb located southwest of Georges
Bank.
By 8:00 p.m. AST Sunday low 996 mb located over West Scotian Slope.

Marine Weather Statement

Issued 3:16 PM AST 13 December 2025 A low pressure system will approach the marine district on Sunday and
will move to lie over West Scotian Slope Sunday evening. Strong to
gale force southwest winds are forecast late Sunday over the southern
slope waters. Strong to possibly gale force northerlies will develop
over western and northern marine areas late Sunday.

Marine interests are advised that gale warnings are in effect for
East Scotian Slope - southern half and Laurentian Fan - southern
half.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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