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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 25 October 2026

Today Tonight and Monday.

Wind southwest 15 knots diminishing to southwest 10 early this evening then veering to west 10 near midnight. Wind increasing to northwest 15 late overnight then veering to north 10 to 15 Monday morning. Wind veering to northeast 15 Monday evening.

Scattered showers this afternoon and tonight.

Waves

Issued 10:30 AM EDT 25 October 2026
Today Tonight and Monday. Waves 0.5 to 1 metre subsiding to 0.5 or less this evening then building to 0.5 to 1 early Monday morning.

Extended Forecast

Issued 03:00 AM EDT 25 October 2026
Tuesday Wind northeast 15 knots diminishing to light in the afternoon.
Wednesday Wind south 15 knots veering to southwest 20 late in the day.
Thursday Wind southwest 15 knots diminishing to light.

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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 10:30 AM EDT 25 October 2026 Today Tonight and Monday At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over Pennsylvania.
By 10:30 a.m. EDT Monday ridge located on a line northeast-southwest
over Virginia.

At 10:30 a.m. EDT today cold front from 988 mb low located on a
line northeast-southwest over Whitefish Bay.
By 10:30 a.m. EDT Monday cold front located on a line
northeast-southwest over Montréal.

By 10:30 a.m. EDT Monday high 1038 mb located over southern
Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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