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Cabot Strait - southern half

Warnings

Forecast

Marine Forecast

Issued 03:00 AM AST 10 December 2025

Today Tonight and Thursday.

Wind southwest 15 knots increasing to southwest 25 to 30 early this afternoon then diminishing to variable 10 to 15 early this evening. Wind increasing to southeast 20 overnight then veering to southerly 25 Thursday morning. Wind diminishing to southwest 15 Thursday evening.

Scattered flurries or showers late this morning. Showers this afternoon. Periods of rain Thursday.

Temperatures minus 2 rising to plus 7 Thursday afternoon.

Waves

Issued 05:00 AM AST 10 December 2025
Today Tonight and Thursday. Seas 2 to 3 metres subsiding to 1 to 2 this morning and to 1 or less after midnight. Seas building to 2 Thursday morning.

Extended Forecast

Issued 03:00 AM 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 9 December 2025 Today Tonight and Wednesday 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 9 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 4741N 6431W to 4827N 6402W 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 9 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 10 Dec estimated from Newfoundland near
4745N 5245W to 4800N 5100W to 5300N 5015W to 5945N 5730W then
northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM AST 10 December 2025 Today Tonight and Thursday At 3:00 a.m. AST today trough located over New England.
By 8:00 p.m. AST tonight trough located on a line north-south over
the eastern Marine District.

At 8:00 p.m. AST tonight low 990 mb located over southern Ontario.
By 3:30 p.m. AST Thursday low 986 mb located over the northern
Gulf of St. Lawrence.

Marine Weather Statement

Issued 2:37 AM AST 10 December 2025 A trough of low pressure will track across the marine district today.
Strong to gale force southerly winds will develop ahead of this
feature.

A second low pressure system developing over Southern Ontario 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, Laurentian Fan
and Anticosti - northwestern half.

Additionally, a freezing spray warning is in effect Anticosti.

Atlantic - Maritimes Area

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Marine Weather for Canada

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