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Laurentian Fan

Warnings

Forecast

Marine Forecast

Issued 10:00 AM AST 10 December 2025

Today Tonight and Thursday.

Gale warning in effect.

Wind southwest 20 to 25 knots increasing to southerly 40 early this evening then diminishing to southwest 30 late overnight. Wind increasing to southwest 45 Thursday morning then diminishing to west 20 Thursday evening.

Showers ending overnight. Risk of thunderstorms tonight. Rain Thursday with a risk of thunderstorms.

Waves

Issued 05:00 AM AST 10 December 2025

Laurentian Fan - northwestern half

Today Tonight and Thursday. Seas 2 metres building to 3 late this afternoon and to 4 late this evening.

Laurentian Fan - southeastern half

Today Tonight and Thursday. Seas 2 to 3 metres building to 3 to 4 late this afternoon and to 4 to 6 Thursday morning.

Extended Forecast

Issued 03:00 AM AST 10 December 2025
Friday Wind west 45 knots.
Saturday Wind west 35 knots diminishing to west 25.
Sunday Wind west 20 knots increasing to south 30.

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 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

Warnings (In effect)

Gale warning in effect

Laurentian Fan

Issued 10:00 AM AST 10 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 10 December 2025 Today Tonight and Thursday At 10:00 a.m. AST today trough located south of Georges Bank.
By 3:00 a.m. AST Thursday trough located east of the 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 9:37 AM AST 10 December 2025 A trough of low pressure will track northeastward across the southern
marine district today. Strong to gale force southerly winds will
develop ahead of this feature.

A 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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