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Forecast

Marine Forecast

Issued 03:00 AM EST 12 December 2025

Today Tonight and Saturday.

Wind west 20 to 30 knots diminishing to west 10 to 15 this evening and to light overnight. Wind becoming southwest 10 to 15 Saturday evening.

Scattered flurries Saturday. Visibility as low as 1 mile in flurries.

Temperatures minus 8 rising to minus 2 Saturday afternoon.

Extended Forecast

Issued 06:00 AM EST 12 December 2025
Sunday Wind light becoming northwest 15 knots in the afternoon.
Monday Wind northwest 15 knots backing to southwest 15.
Tuesday Wind southwest 10 to 15 knots.

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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 December 2025 Today Tonight and Saturday At 3:00 a.m. EST today low 980 mb located over Anticosti Island.
By 7:00 p.m. EST tonight departing low 972 mb located over
Labrador Sea.

At 7:00 a.m. EST today ridge located on a line north-south over
Lake Superior.
By 7:00 p.m. EST Saturday ridge located from the Gaspe Peninsula
to James Bay.

At 7:00 p.m. EST tonight trough located on a line north-south over
Lake Superior.
By 7:00 p.m. EST Saturday trough located on a line north-south
over Lake Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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