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Southwestern Grand Banks

Warnings

Forecast

Marine Forecast

Issued 03:30 PM NST 04 December 2025

Tonight and Friday.

Storm warning in effect.

Wind variable 10 to 15 knots increasing to variable 15 to 20 this evening and to southeast 35 late overnight. Wind increasing to west 45 to 55 Friday morning.

Rain beginning this evening changing to flurries near noon Friday. Fog patches forming overnight and dissipating near noon Friday. Visibility 1 mile or less in fog patches and in flurries.

Waves

Issued 06:00 PM NST 04 December 2025
Tonight and Friday. Seas 3 to 5 metres building to 6 to 8 near noon Friday and to 8 to 11 Friday evening.

Extended Forecast

Issued 03:30 PM NST 04 December 2025
Saturday Wind west 45 to 55 knots diminishing to west 35 in the afternoon.
Sunday Wind northwest 25 knots.
Monday Wind northwest 25 knots diminishing to south 15 to 20.

Ice Forecast

Issued 10:00 AM EST 4 December 2025 Today Tonight and Friday 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

Southwestern Grand Banks

Issued 10:00 AM EST 4 December 2025 Today Tonight and Friday

Ice Edge

First ice edge estimated from Newfoundland near 5039N 5607W to 5042N
5551W to 5141N 5511W to 5142N 5511W to 5147N 5545W to Newfoundland
near 5137N 5557W. Sea ice west then south of the ice edge.

Second ice edge estimated from Labrador near 5347N 5630W to 5445N
5700W to 5547N 5953W to 5646N 6052W to 5928N 6239W to Labrador near
6018N 6424W. Sea ice west of the ice edge.

Ice Coverage

Ice free.

Ice Forecasts

Tail of the Grand Banks

Issued 10:00 AM EST 4 December 2025 Today Tonight and Friday

Ice Edge

First ice edge estimated from Newfoundland near 5039N 5607W to 5042N
5551W to 5141N 5511W to 5142N 5511W to 5147N 5545W to Newfoundland
near 5137N 5557W. Sea ice west then south of the ice edge.

Second ice edge estimated from Labrador near 5347N 5630W to 5445N
5700W to 5547N 5953W to 5646N 6052W to 5928N 6239W to Labrador near
6018N 6424W. Sea ice west of the ice edge.

Ice Coverage

Forecasts available to mariners upon request.

 

Iceberg Bulletin

Southwestern Grand Banks

Issued 1:30 PM EST 4 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 5 Dec estimated from Newfoundland near
4900N 5350W to 4900N 4815W to 5000N 4700W to 5100N 4730W to 5945N
5730W to 6120N 5340W then eastward.

Iceberg Count

No confirmed icebergs.

Iceberg Bulletin

Tail of the Grand Banks

Issued 1:30 PM EST 4 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 5 Dec estimated from Newfoundland near
4900N 5350W to 4900N 4815W to 5000N 4700W to 5100N 4730W to 5945N
5730W to 6120N 5340W then eastward.

Iceberg Count

Forecasts available to mariners upon request.
Warnings

Warnings (In effect)

Storm warning in effect

Southwestern Grand Banks

Issued 3:30 PM NST 04 December 2025

'Storm' force winds of 48 to 63 knots are occurring or expected to occur in this marine area. 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 3:30 PM NST 4 December 2025 Tonight and Friday At 3:30 p.m. NST today departing low 963 mb located east of the
Marine District.

At 3:30 p.m. NST today deepening low 997 mb located over Quebec.
By 3:30 p.m. NST Friday low 971 mb located over southeastern Funk
Island Bank.

At 3:30 p.m. NST today ridge located on a line north-south over
the Avalon Peninsula.
By 3:00 a.m. NST Friday departing ridge located east of the
Grand Banks.

Marine Weather Statement

Issued 3:24 PM NST 4 December 2025 A low pressure system over Quebec will cross the district tonight and
Friday to lie over Funk Island Bank by Friday afternoon. Strong to
gale force southeasterly to northeasterly winds will spread over most
waters ahead of the low tonight before shifting to gale to storm
force west to northwesterlies in its wake.

Marine interests are advised that storm warnings are in effect for
all waters except Strait of Belle Isle, Northeast Gulf, and Belle
Isle Bank. Gale warnings are in effect for Northeast Gulf and Belle
Isle Bank.

Marine interests are also advised that freezing spray warnings are in
effect for Gulf waters.

Atlantic - Maritimes Area

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Marine Weather for Canada

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