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Kingston to Cornwall

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Forecast

Marine Forecast

Issued 03:00 AM EDT 19 August 2026

Today Tonight and Thursday.

Wind southwest 10 knots veering to west 10 this morning then becoming light this afternoon. Wind light tonight and Thursday.

Scattered showers today and this evening with a risk of thunderstorms. Scattered showers Thursday late in the day. Fog patches forming near midnight and dissipating near noon Thursday.

Extended Forecast

Issued 03:00 AM EDT 19 August 2026
Friday Wind light.
Saturday Wind light becoming southwest 15 knots late in the day.
Sunday Wind southwest 15 knots.

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Map of St. Lawrence - St. Lawrence River marine weather areas Grand Manan New Carlisle Pointe-au-Père Fundy Park (Alma) Port Menier Miramichi Île Bicquette Charlo Cap-Chat Bathurst Airport CFB Bagotville Jonquière Mistook Normandin Roberval Airport Île-d'Orléans - Quai de St-Jean Deschambault North Bay Airport Beauport L'Isle-aux-Grues Bas Caraquet Lake Nipissing - 45152 Pointe-des-Monts L'Assomption Baie-Comeau Airport Saint-Anicet Cap-Rouge Sainte-Anne-de-Bellevue Lac Memphrémagog Montréal Metropolitain Airport Île Rouge Montréal-Trudeau Int'l Airport Lac Saint-Pierre Trois-Rivières Airport Pointe de l'Islet Pointe Claveau Sept-Îles Airport Kouchibouguac North Cape Pointe-Noire Yarmouth Airport Cap-d'Espoir Brier Island Rivière-la-Madeleine St. Stephen Gaspé Airport Saint John Airport Point Lepreau Greater Moncton Roméo LeBlanc Int'l Airport La Pocatière Miscou Island Mont-Joli Airport
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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 19 August 2026 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over New York State.
By 3:00 a.m. EDT Thursday ridge located from the Ontario - Manitoba
border to Iowa then to Lake Ontario.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over Georgian Bay.
By 3:00 a.m. EDT Thursday cold front located on a line
northeast-southwest over the Gulf of St. Lawrence.

St. Lawrence - St. Lawrence River Area

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Marine Weather for Canada

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