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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 PM EDT 07 July 2025

Tonight and Tuesday.

Wind northeast 15 to 20 knots diminishing to northeast 10 to 15 after midnight then becoming light Tuesday evening.

Showers ending overnight. Risk of thunderstorms late this afternoon and this evening. Mist forming overnight and dissipating Tuesday morning. Visibility as low as 1 mile in mist.

Extended Forecast

Issued 06:00 PM EDT 07 July 2025
Wednesday Wind light.
Thursday Wind light.
Friday 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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Ice Conditions

There is no ice forecast issued for this area.

Warnings

Watches (Ended)

Squall watch ended

Cornwall to Montréal

Issued 7:48 PM EDT 07 July 2025
Synopsis

Technical Marine Synopsis

Issued 3:00 PM EDT 7 July 2025 Tonight and Tuesday At 3:00 p.m. EDT today quasi-stationary ridge located from Lake
Superior to Sept-Îles.

At 3:00 p.m. EDT today low 1008 mb located over Lake Huron.
By 8:00 p.m. EDT Tuesday low 1010 mb located southeast of Nova
Scotia.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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