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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 09:44 PM EDT 16 March 2026

Tonight and Tuesday.

Gale warning in effect.

Wind southwest 20 to 30 knots increasing to southwest 35 to 45 after midnight then diminishing to southwest 25 to 35 near noon Tuesday. Wind diminishing to west 15 to 25 early Tuesday evening.

Showers changing to flurries after midnight. Visibility 1 mile or less in flurries.

Temperatures plus 13 falling to minus 11 Tuesday evening.

Extended Forecast

Issued 06:00 PM EDT 16 March 2026
Wednesday Wind west 15 to 25 knots diminishing to southwest 10 to 15 in the morning.
Thursday Wind southerly 10 to 20 knots.
Friday Wind southerly 10 to 20 knots veering to west 15 to 25 late in the day.

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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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land station Land Station
Ice Conditions

There is no ice forecast issued for this area.

Warnings

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 9:44 PM EDT 16 March 2026

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 3:00 PM EDT 16 March 2026 Tonight and Tuesday At 3:00 p.m. EDT today departing ridge located on a line north-south
over Newfoundland.

At 3:00 p.m. EDT today low 989 mb located over Lake Huron.
By 8:00 p.m. EDT Tuesday low 953 mb located over southern Ungava
Bay.

At 2:00 a.m. EDT Tuesday ridge located on a line north-south over
western Ontario.
By 8:00 p.m. EDT Tuesday ridge located on a line north-south over
the Great Lakes.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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