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Cornwall to Montréal

Warnings

Forecast

Marine Forecast

Issued 11:22 PM EDT 01 July 2025

Tonight and Wednesday.

Wind light increasing to westerly 15 to 20 knots early Wednesday morning then diminishing to southwest 10 to 15 early Wednesday evening.

Extended Forecast

Issued 06:00 PM EDT 01 July 2025
Thursday Wind west 10 to 20 knots.
Friday Wind west 15 knots.
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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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 PM EDT 1 July 2025 Tonight and Wednesday At 3:00 p.m. EDT today low 991 mb located northeast of James Bay.
By 8:00 p.m. EDT Wednesday low 988 mb located over Labrador Sea.

At 3:00 p.m. EDT today trough located on a line northeast-southwest
over western Quebec.
By 8:00 p.m. EDT Wednesday departing trough located on a line
northeast-southwest over the Quebec Lower North Shore.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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