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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 10 August 2026

Tonight and Tuesday.

Wind west 15 knots veering to northwest 15 near midnight then diminishing to northwest 10 early Tuesday morning. Wind backing to west 10 near noon Tuesday.

Waves

Issued 06:30 PM EDT 10 August 2026
Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less Tuesday morning.

Extended Forecast

Issued 06:30 PM EDT 10 August 2026
Wednesday Wind light becoming southwest 15 knots in the afternoon.
Thursday Wind light.
Friday Wind northeast 15 knots backing to northwest 15.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville 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 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 10 August 2026 Tonight and Tuesday At 6:30 p.m. EDT tonight departing trough located on a line
northeast-southwest over southern Ontario.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over southern Manitoba.
By 6:30 p.m. EDT Tuesday ridge located on a line northwest-southeast
over Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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