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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 12 November 2025

Today Tonight and Thursday.

Wind southwest 15 knots diminishing to light late this afternoon then becoming west 10 to 15 Thursday morning. Wind diminishing to light Thursday evening.

Flurries or showers. Visibility as low as 1 mile in precipitation.

Temperatures near plus 1.

Extended Forecast

Issued 06:00 PM EST 11 November 2025
Thursday Wind light.
Friday Wind light.
Saturday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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 EST 12 November 2025 Today Tonight and Thursday At 3:00 a.m. EST today low 972 mb located north of the Strait of
Belle Isle.
By 7:00 a.m. EST Thursday departing low 976 mb located north of
Ungava Bay.

At 3:00 a.m. EST today ridge located on a line north-south over
Cornwall.
By 7:00 p.m. EST Thursday ridge located over Labrador to the
Great Lakes.

At 3:00 a.m. EST today low 994 mb located north of Lake Superior.
By 7:00 a.m. EST Thursday dissipating low located over New England.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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