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Kingston to Cornwall

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 18 April 2026

Today Tonight and Sunday.

Wind light becoming southeast 10 knots early this morning then increasing to southeast 15 near noon. Wind veering to southwest 15 early this evening then to west 15 overnight. Wind diminishing to west 10 Sunday afternoon.

Showers and fog patches beginning this evening with a risk of thunderstorms early this evening becoming scattered flurries or scattered showers Sunday morning and ending Sunday morning. Scattered showers or scattered flurries Sunday late in the day. Fog patches dissipating near noon.

Extended Forecast

Issued 03:00 AM EDT 18 April 2026
Monday Wind northwest 15 knots diminishing to light late in the day.
Tuesday Wind light becoming south 15 knots.
Wednesday Wind light.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 18 April 2026 Today Tonight and Sunday At 3:00 a.m. EDT today low 994 mb located over northeastern Ontario.
By 3:00 a.m. EDT Sunday low 981 mb located over eastern Hudson Bay.

At 3:00 a.m. EDT today cold front located on a line north-south
over eastern Lake Superior.
By 3:00 a.m. EDT Sunday cold front from low located on a line
northeast-southwest over the St. Lawrence River.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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