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Gulf - Magdalen - northeastern half

Warnings

Forecast

Marine Forecast

Issued 10:00 AM AST 06 December 2025

Today Tonight and Sunday.

Wind northwest 20 knots diminishing to light early this afternoon then increasing to southwest 15 near midnight. Wind increasing to west 20 to 25 Sunday morning.

Flurries ending this afternoon. Flurries beginning near midnight and becoming showers or flurries Sunday morning then flurries near noon Sunday. Visibility 1 mile or less in precipitation.

Freezing spray warning in effect.

Freezing spray beginning Sunday evening.

Temperatures minus 4 rising to plus 3 Sunday morning then falling to minus 4 Sunday evening.

Waves

Issued 05:00 AM AST 06 December 2025
Today Tonight and Sunday. Seas 3 to 4 metres subsiding to 1 to 2 near noon and to 1 or less this evening. Seas building to 1 to 2 Sunday morning and to 2 to 3 near noon Sunday.

Extended Forecast

Issued 03:00 AM AST 06 December 2025
Monday Wind northwest 20 knots increasing to northwest 30 in the afternoon.
Tuesday Wind west 30 knots.
Wednesday Wind southwest 25 knots diminishing to southwest 15 late in the day.

Ice Forecast

Issued 10:00 AM EST 6 December 2025 Today Tonight and Sunday Open water except 2 tenths new ice along parts of the Magdalen Islands. 

[ Canadian Ice Service ]

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Map of St. Lawrence - St. Lawrence River marine weather areas Cap-Chat Mont-Joli Airport Bathurst Airport Île Bicquette Charlo Port Menier Miramichi Pointe-au-Père Fundy Park (Alma) New Carlisle Grand Manan Bas Caraquet CFB Bagotville Jonquière Mistook Normandin Roberval Airport Deschambault Beauport North Bay Airport Trois-Rivières Airport Lake Nipissing - 45152 Kouchibouguac Baie-Comeau Airport Île d'Orléans Saint-Anicet Sainte-Anne-de-Bellevue Cap-Rouge Lac Memphrémagog Montréal Metropolitain Airport Montréal-Trudeau Int'l Airport Île Rouge Lac Saint-Pierre L'Isle-aux-Grues L'Assomption Pointe de l'Islet Pointe Claveau Sept-Îles Airport Pointe-des-Monts North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport Miscou Island Kouchibouguac La Pocatière
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Ice Conditions

Ice Forecasts

Issued 10:00 AM EST 6 December 2025 Today Tonight and Sunday

Ice Edge

First ice edge estimated from New Brunswick near 4511N 6609W to
4508N 6549W to 4518N 6513W to Nova Scotia near 4510N 6445W. Sea ice
northeast of the ice edge.

Second ice edge estimated from Nova Scotia near 4546N 6254W to 4558N
6310W to Prince Edward Island near 4558N 6250W. Sea ice west of the
ice edge.

Third 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.

Fourth ice edge estimated from Prince Edward Island near 4630N 6319W
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.

Fifth ice edge estimated from Anticosti Island near 4949N 6317W to
4946N 5954W to Quebec near 5125N 5736W. Sea ice north of the ice
edge.

Ice Coverage

Open water except 2 tenths new ice along parts of the Magdalen
Islands.

 

Iceberg Bulletin

Issued 1:30 PM EST 5 December 2025

Iceberg Limit

Iceberg limit at 0000 UTC 6 Dec estimated from Newfoundland near
4830N 5310W to 4900N 4815W to 5000N 4700W to 5100N 4730W to 5945N
5730W to 6120N 5340W then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

Warnings (In effect)

Freezing spray warning in effect

Gulf - Magdalen - northeastern half

Issued 10:00 AM AST 06 December 2025

Moderate or severe freezing spray is 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 10:00 AM AST 6 December 2025 Today Tonight and Sunday At 10:00 a.m. AST today low 1003 mb located southwest of Georges
Bank.
By 3:00 a.m. AST Sunday low 999 mb located southeast of Laurentian
Fan.

At 3:00 a.m. AST Sunday low 1004 mb located near the St. Lawrence
River.
By 3:30 p.m. AST Sunday low 1000 mb located over the northeastern
Gulf of St. Lawrence.

At 10:00 a.m. AST today ridge located over the central Marine
District.
By 3:00 a.m. AST Sunday dissipating ridge located over the eastern
Marine District.

Marine Weather Statement

Issued 9:42 AM AST 6 December 2025 Marine interests are advised that gale warnings have been ended.

Marine interests are also advised that freezing spray warnings are in
effect for Cabot Strait, Gulf-Magdalen, Chaleur-Miscou, and
Anticosti.

Higher than normal water levels are expected at high tide today for
Chaleur - Miscou.

St. Lawrence - St. Lawrence River Area

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