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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 13 December 2025

Tonight and Sunday.

Wind northwest 20 knots veering to north 15 near midnight then backing to northwest 15 near noon Sunday.

Scattered flurries. Visibility 1 mile or less in flurries.

Risk of freezing spray early this evening.

Waves

Issued 06:30 PM EST 13 December 2025
Tonight and Sunday. Waves 1.5 metres subsiding to 1 this evening.

Extended Forecast

Issued 06:30 PM EST 13 December 2025
Monday Wind light increasing to southwest 25 knots in the morning.
Tuesday Wind southwest 25 knots increasing to southwest 30 late in the day.
Wednesday Wind southwest 30 knots veering to northwest 25.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
Legend:
buoy Buoy
land station Land Station
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 6:30 PM EST 13 December 2025 Tonight and Sunday At 6:30 p.m. EST tonight departing low 1008 mb located over
southern Quebec.

At 6:30 p.m. EST tonight ridge from 1040 mb high located on a line
north-south over North Dakota.
By 10:30 a.m. EST Sunday approaching ridge from 1045 mb high
located on a line north-south over Illinois.

By 6:30 p.m. EST Sunday approaching trough located on a line
northeast-southwest over northeastern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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