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Warnings

Forecast

Marine Forecast

Issued 03:00 AM ADT 10 March 2026

Today Tonight and Wednesday.

Wind southwest 20 to 25 knots diminishing to southwest 15 early this morning and to light near noon. Wind becoming southwest 15 early this evening then diminishing to light overnight. Wind increasing to east 20 Wednesday morning then veering to southeast 25 Wednesday afternoon.

Showers Wednesday evening. Fog patches forming early this morning and dissipating near noon.

Waves

Issued 05:00 AM ADT 10 March 2026
Today Tonight and Wednesday. Seas 1 to 2 metres subsiding to 1 near midnight.

Extended Forecast

Issued 03:00 AM ADT 10 March 2026
Thursday Wind southwest 35 knots diminishing to west 25 late in the day.
Friday Wind west 35 knots diminishing to southwest 20.
Saturday Wind light increasing to south 35 knots late in the day.

Ice Forecast

Issued 10:00 AM EDT 9 March 2026 Today Tonight and Tuesday Open water. Consolidated grey-white ice in a few sheltered bays. 

[ 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 EDT 9 March 2026 Today Tonight and Tuesday

Ice Edge

Ice edge estimated from 4420N 6720W to 4430N 6635W to 4330N 6615W to
4315N 6515W to 4600N 5749W to 4708N 5834W to 4630N 5615W to
Newfoundland near 4640N 5530W. Sea ice north of the ice edge.

Ice Coverage

Open water. Consolidated grey-white ice in a few sheltered bays.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM ADT 10 March 2026 Today Tonight and Wednesday At 3:00 a.m. ADT today trough located over the St. Lawrence River.
By 10:00 a.m. ADT today departing trough located over southeastern
Labrador.

At 8:00 p.m. ADT tonight building high located over Quebec.
By 8:00 p.m. ADT Wednesday departing ridge from high located from
Labrador to Newfoundland.

At 8:00 p.m. ADT tonight approaching low located west of the
Maritimes.

Marine Weather Statement

Issued 2:12 AM ADT 10 March 2026 A trough of low pressure will pass just north of the marine district
this morning. Strong to gale force winds ahead of the trough are
expected to diminish through the day as it pulls away and a weak
ridge builds into the district.

Marine interests are advised that a gale warning is in effect for
Anticosti - northwestern half.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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