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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 08 December 2025

Today Tonight and Tuesday.

Wind variable 10 knots becoming northwest 10 near noon then increasing to southwest 15 early this evening. Wind increasing to southwest 25 near midnight then backing to south 30 early Tuesday morning. Wind veering to west 25 Tuesday afternoon.

Scattered flurries beginning near noon changing to snow Tuesday morning then to scattered flurries Tuesday evening. Visibility 1 mile or less in snow.

Waves

Issued 10:30 AM EST 08 December 2025
Today Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 this evening and to 1.5 late overnight. Waves building to 2 to 3 Tuesday morning then subsiding to 1.5 Tuesday evening.

Extended Forecast

Issued 03:00 AM EST 08 December 2025
Wednesday Wind light increasing to northeast 20 knots in the morning.
Thursday Wind northwest 20 knots.
Friday Wind light increasing to southwest 25 knots 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

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 8 December 2025 Today Tonight and Tuesday At 10:30 a.m. EST today ridge located on a line northeast-southwest
over northeastern Ontario.
By 10:30 a.m. EST Tuesday ridge located on a line
northeast-southwest over the Eastern Seaboard.

By 10:30 a.m. EST Tuesday low 1002 mb located over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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