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Cabot Strait - southern half

Warnings

Forecast

Marine Forecast

Issued 10:00 AM AST 16 December 2025

Today Tonight and Wednesday.

Gale warning in effect.

Wind northwest 30 knots diminishing to west 20 early this evening then backing to southwest 25 late overnight. Wind increasing to southwest 35 near noon Wednesday.

Flurries ending near midnight. Visibility 1 mile or less in flurries.

Temperatures minus 2 rising to plus 5 Wednesday evening.

Waves

Issued 05:00 AM AST 16 December 2025
Today Tonight and Wednesday. Seas 3 to 5 metres subsiding to 2 to 3 this morning and to 1 to 2 after midnight. Seas building to 2 to 3 near noon Wednesday.

Extended Forecast

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

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 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 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.

 

Iceberg Bulletin

Issued 1:30 PM EST 15 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 16 Dec estimated from Newfoundland near
4730N 5239W to 4715N 4945W to 5115N 4715W to 5945N 5730W to 6155N
5330W to 6005N 4945W to 5900N 4600W then northeastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Gale warning in effect

Cabot Strait - southern half

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.

Atlantic - Maritimes Area

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Marine Weather for Canada

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