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Gulf - Magdalen - southwestern half

Warnings

Forecast

Marine Forecast

Issued 03:30 PM AST 05 March 2026

Tonight and Friday.

Wind northerly 10 to 15 knots diminishing to light early this evening then becoming southerly 10 to 15 Friday evening.

Temperatures minus 14 rising to minus 8 Friday afternoon.

Waves

Issued 05:00 PM AST 05 March 2026
Tonight and Friday. Mainly ice covered.

Extended Forecast

Issued 03:30 PM AST 05 March 2026
Saturday Wind southerly 25 knots increasing to south 35 in the afternoon.
Sunday Wind southwest 25 knots veering to northwest 20.
Monday Wind southwest 20 knots.

Ice Forecast

Issued 10:00 AM EST 5 March 2026 Today Tonight and Friday 6 tenths grey ice including 1 tenth first-year ice except 8 tenths grey-white ice including 3 tenths first-year ice in the southwestern section. Consolidated first-year ice along parts of the coasts. 

[ Canadian Ice Service ]

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

Ice Forecasts

Issued 10:00 AM EST 5 March 2026 Today Tonight and Friday

Ice Edge

Ice edge estimated from 4420N 6720W to 4430N 6635W to 4330N 6615W to
4315N 6515W to 4600N 5845W to 4714N 5856W to 4630N 5615W to
Newfoundland near 4640N 5530W. Sea ice north of the ice edge.

Ice Coverage

6 tenths grey ice including 1 tenth first-year ice except 8 tenths
grey-white ice including 3 tenths first-year ice in the southwestern
section. Consolidated first-year ice along parts of the coasts.

 

Iceberg Bulletin

Issued 1:50 PM EST 5 March 2026

Iceberg Limit

Iceberg limit at 0000 UTC 6 Mar estimated from Newfoundland near
4640N 5310W to 4455N 4955W to 4545N 4525W to 4820N 4140W to 5930N
5700W to 6150N 5400W to 5850N 5035W to 5810N 4530W then eastward.

Iceberg Count

No confirmed icebergs.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:30 PM AST 5 March 2026 Tonight and Friday At 3:30 p.m. AST today building ridge located from Quebec to
New Brunswick.
By 8:00 p.m. AST Friday ridge located from the Gulf of St. Lawrence
to the Grand Banks.

At 3:00 a.m. AST Friday low located south of Long Island.
By 8:00 p.m. AST Friday low located south of Georges Bank.

Marine Weather Statement

Issued 3:06 PM AST 5 March 2026 A cold northerly flow bringing freezing spray across northern waters
will subside tonight as a ridge of high pressure builds over the
Maritimes.

A low pressure system will slowly approach southwestern waters on
Friday passing just south of Georges Bank by evening. Winds will
increase to strong to gale force easterlies ahead of the low.

Marine interests are advised that gale warnings are in effect for
Georges Bank, West Scotian Slope and Cabot Strait - northern half.

Marine interests are also advised that freezing spray warnings are in
effect for eastern shore, Sable - eastern half, Fourchu, Banquereau,
Cabot Strait, Gulf-Magdalen - northeastern half and Anticosti.

St. Lawrence - St. Lawrence River Area

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