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Marine Forecast

Issued 10:00 AM AST 16 December 2025

Today Tonight and Wednesday.

Gale warning in effect.

Wind northwest 25 knots backing to west 15 to 20 near noon then to southwest 25 near midnight. Wind increasing to southwest 35 Wednesday afternoon.

Temperatures minus 1 rising to plus 8 Wednesday afternoon.

Waves

Issued 05:00 AM AST 16 December 2025
Today Tonight and Wednesday. Seas 1 to 2 metres building to 3 Wednesday morning.

Extended Forecast

Issued 03:00 AM AST 16 December 2025
Thursday Wind northwest 30 knots diminishing to south 20 in the afternoon.
Friday Wind south 35 knots increasing to south 45.
Saturday Wind southwest 40 knots diminishing to west 30.

Ice Forecast

Issued 10:00 AM EST 16 December 2025 Today Tonight and Wednesday 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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Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 16 December 2025 Today Tonight and Wednesday

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 5035N 5733W to 4818N 5929W to 4731N
5923W to Newfoundland near 4736N 5740W. Sea ice north then east of
the ice edge.

Ice Coverage

Ice free.

Warnings

Warnings (In effect)

Gale warning in effect

Lurcher

Issued 10:00 AM AST 16 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.

Synopsis

Technical Marine Synopsis

Issued 10:00 AM AST 16 December 2025 Today Tonight and Wednesday At 10:00 a.m. AST today ridge located over southeastern Quebec.
By 8:00 p.m. AST tonight ridge located over the southwestern
Marine District.

At 10:00 a.m. AST Wednesday trough from 979 mb low located on a
line northeast-southwest over Quebec.
By 8:00 p.m. AST Wednesday trough from 978 mb low located on a
line northeast-southwest over the St. Lawrence River.

Marine Weather Statement

Issued 9:38 AM AST 16 December 2025 Gale force northwesterly winds behind a low off the coast of
Northeast Newfoundland, will diminish this morning.

A trough of low pressure over Quebec Wednesday morning will push east
to lie over the St Lawrence River by Wednesday evening. Strong to
gale force southwesterlies will develop early Wednesday ahead of the
trough.

Marine interests are advised that gale warnings are in effect for all
waters except Gulf - Magdalen - southeastern half, Northumberland
Strait, Chaleur - Miscou, and Anticosti - northwestern half.

Freezing spray warnings are in effect for Northumberland Strait -
eastern half, Gulf - Magdalen, Chaleur - Miscou, and Anticosti.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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