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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 02 July 2025

Today Tonight and Thursday.

Wind light increasing to westerly 15 to 20 knots early this morning then diminishing to southwest 10 to 15 early this evening. Wind veering to northwest 10 to 15 Thursday morning.

Scattered showers this afternoon and this evening. Showers Thursday with a risk of thunderstorms.

Extended Forecast

Issued 06:00 AM EDT 02 July 2025
Friday Wind west 15 knots.
Saturday Wind southwest 10 to 15 knots.
Sunday Wind southwest 20 knots veering to northwest 15 late in the day.

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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

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 2 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today dissipating trough located on a line
northeast-southwest over Gaspé.

At 3:00 a.m. EDT today trough located on a line northeast-southwest
over northern Ontario.
By 8:00 p.m. EDT Thursday trough located on a line north-south
over Anticosti Island.

At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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