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Grand Manan

Warnings

Forecast

Marine Forecast

Issued 03:30 PM ADT 12 March 2026

Tonight and Friday.

Wind southwest 25 knots veering to northwest 20 early this evening then increasing to northwest 30 after midnight. Wind backing to west 25 near noon Friday then to southwest 15 to 20 Friday evening.

Showers and occasional fog patches changing to flurries this evening and ending near midnight.

Temperatures plus 6 falling to minus 2 near noon Friday then rising to plus 3 Friday evening.

Waves

Issued 05:00 PM ADT 12 March 2026
Tonight and Friday. Seas 2 to 3 metres subsiding to 1 to 2 Friday evening.

Extended Forecast

Issued 03:30 PM ADT 12 March 2026
Saturday Wind southeast 20 knots increasing to southwest 30 in the afternoon then diminishing to northwest 20 late in the day.
Sunday Wind northwest 20 knots diminishing to light.
Monday Wind southeast 20 knots increasing to south 35.

Ice Forecast

Issued 10:00 AM EDT 12 March 2026 Today Tonight and Friday Open water. 

[ Canadian Ice Service ]

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Weather Conditions

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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 EDT 12 March 2026 Today Tonight and Friday

Ice Edge

Ice edge estimated from 4420N 6720W to 4430N 6635W to 4330N 6615W to
4315N 6515W to 4603N 5814W to 4722N 5805W to 4643N 5628W to
Newfoundland near 4640N 5530W. Sea ice north of the ice edge.

Ice Coverage

Open water.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:30 PM ADT 12 March 2026 Tonight and Friday At 3:30 p.m. ADT today departing low 994 mb located over the Gulf
of St. Lawrence.

At 3:00 a.m. ADT Friday trough from low located on a line
northeast-southwest over the eastern Marine District.
By 8:00 p.m. ADT Friday departing trough located east of the
Grand Banks.

Marine Weather Statement

Issued 3:13 PM ADT 12 March 2026 A low pressure system is currently over the Gulf waters and will
Progress into the Gulf of St. Lawrence by this evening. Winds are
forecast to become strong to gale force northwesterlies in its wake
this afternoon and into the evening.

Marine interests are advised that gale warnings are in effect for all
waters except for Fundy, Grand Manan, Lurcher, Browns Bank, Georges
Bank, southwestern shore, West Scotian Slope, Northumberland Strait,
and Chaleur - Miscou - western half.

Marine interests are also advised that freezing spray warnings are in
effect for Cabot Strait - northern half and all Gulf of St. Lawrence
waters except Northumberland Strait.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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