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Marine Forecast

Issued 03:00 AM EST 06 December 2025

Today Tonight and Sunday.

Wind southerly 10 to 15 knots veering to southwest 15 to 20 early this evening then to northwest 15 near midnight. Wind diminishing to light Sunday morning then becoming northeast 10 to 15 Sunday evening.

Flurries today and this evening. Periods of snow Sunday late in the day. Visibility as low as 1 mile in precipitation.

Temperatures minus 8 rising to zero this afternoon then falling to minus 12 Sunday morning.

Extended Forecast

Issued 06:00 PM EST 05 December 2025
Sunday Wind northwest 10 to 15 knots becoming light in the morning.
Monday Wind northwest 10 to 15 knots backing to southwest 10 to 15 late in the day.
Tuesday 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 AM EST 6 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today ridge located on a line north-south over
the Gaspe Peninsula.
By 5:00 a.m. EST Sunday dissipating ridge located on a line
northwest-southeast over the Quebec Lower North Shore.

At 3:00 a.m. EST today trough located on a line northeast-southwest
over northern Ontario.
By 7:00 a.m. EST Sunday dissipating trough located on a line
north-south over the Gulf of St. Lawrence.

At 7:00 p.m. EST Sunday approaching high 1034 mb located west of
Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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