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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 13 December 2025

Today Tonight and Sunday.

Wind southwest 25 knots veering to west 25 early this morning then to northwest 20 early this evening. Wind veering to north 20 near midnight then backing to northwest 15 near noon Sunday.

Flurries ending overnight. Visibility 1 mile or less in flurries.

Risk of freezing spray late this afternoon and this evening.

Waves

Issued 03:00 AM EST 13 December 2025
Today Tonight and Sunday. Waves 2 metres subsiding to 1.5 early this morning and to 1 this evening.

Extended Forecast

Issued 03:00 AM EST 13 December 2025
Monday Wind light increasing to southwest 30 knots in the afternoon.
Tuesday Wind southwest 20 knots increasing to southwest 25 late in the day.
Wednesday Wind southwest 30 knots diminishing to northwest 20.

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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 3:00 AM EST 13 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today departing ridge located on a line north-south
over Montréal.

At 3:00 a.m. EST today low 1003 mb located over northeastern
Ontario.
By 3:00 a.m. EST Sunday low 1013 mb located over eastern Quebec.

At 3:00 a.m. EST today high 1039 mb located over southern
Saskatchewan.
By 3:00 a.m. EST Sunday approaching high 1045 mb located over
southeastern South Dakota.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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