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Cabot Strait - southern half

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Marine Forecast

Issued 08:00 PM AST 10 December 2025

Tonight and Thursday.

Wind southerly 15 knots increasing to southeasterly 25 late overnight then veering to southwest 25 early Thursday afternoon.

Periods of rain Thursday.

Waves

Issued 05:00 PM AST 10 December 2025
Tonight and Thursday. Seas 1 to 2 metres subsiding to 1 or less after midnight then building to 2 early Thursday morning.

Extended Forecast

Issued 03:30 PM AST 10 December 2025
Friday Wind west 40 knots.
Saturday Wind west 35 knots diminishing to west 25.
Sunday Wind west 20 knots increasing to southeast 25.

Ice Forecast

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

[ Canadian Ice Service ]

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Map of Atlantic - Maritimes marine weather areas Summerside Stephenville Airport North Cape Burgeo Pointe-des-Monts Port aux Basques Sagona Island St. Lawrence Tracadie Winterland Branch Hill Wreckhouse Halifax Harbour - 44258 LaHave Bank - 44150 Sept-Îles Airport Banquereau - 44139 Longue-Pointe-de-Mingan Île Rouge Île aux Perroquets Havre-Saint-Pierre Airport East Scotia Slope - 44137 Baie-Comeau Airport Mont-Joli Airport Rivière-la-Madeleine Saint John Airport Gaspé Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Heath Point Miscou Island Kouchibouguac Îles de la Madeleine Airport Kouchibouguac La Pocatière Grand Manan St. Stephen Fundy Park (Alma) New Carlisle Miramichi Pointe-au-Père Charlo Port Menier Bathurst Airport Île Bicquette Bas Caraquet Cap-Chat East Chedabucto Bay – 44488 West Chedabucto Bay – 44489 Lunenburg Charlottetown Airport Yarmouth Airport Pointe-Noire Western Head J.A. Douglas McCurdy Sydney Airport Shearwater Airport St.Paul Island Sable Island Parrsboro North Mountain Nappan AAFC McNabs Island East Point Kentville AAFC Ingonish Beach Hart Island CFB Greenwood Grand Étang Eskasoni (First Nations) Debert Caribou Point Brier Island Cap-d'Espoir Beaver Island Baccaro Point
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Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 10 December 2025 Today Tonight and Thursday

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 4949N 6317W 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 10 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 11 Dec estimated from Newfoundland near
4730N 5239W to 4745N 5030W to 5230N 5000W to 5945N 5730W to 6155N
5330W to 6005N 4945W then northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 8:00 PM AST 10 December 2025 Tonight and Thursday At 8:00 p.m. AST tonight trough located over East Scotian Slope.
By 3:00 a.m. AST Thursday departing trough located over Banquereau.

At 8:00 p.m. AST tonight low 990 mb located over southern Quebec.
By 3:30 p.m. AST Thursday low 982 mb located over the northern
Gulf of St. Lawrence.

Marine Weather Statement

Issued 7:44 PM AST 10 December 2025 A trough of low pressure over East Scotian Slope will track
northeastward across the southern marine district this evening.
Strong to gale force southerly winds are forecast ahead of this
feature.

A low pressure system over Southern Quebec will track across New
Brunswick Thursday morning to lie over Northern Gulf of St. Lawrence
waters Thursday afternoon. Strong to gale force easterly winds are
forecast ahead of the low. Strong to gale force westerly winds are
expected south of the low late in the day Thursday.

Marine interests are advised that gale warnings are in effect for
Grand Manan, Lurcher, Browns Bank, Georges Bank, southwestern shore,
LaHave Bank, West Scotian Slope, East Scotian Slope, Banquereau -
southeastern half, Laurentian Fan and Anticosti - northwestern half.

Additionally, a freezing spray warning is in effect for Anticosti -
northwestern half.

Atlantic - Maritimes Area

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Marine Weather for Canada

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