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Georgian Bay

Warnings

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Marine Forecast

Issued 10:30 AM EDT 17 August 2026

Today Tonight and Tuesday.

Wind north 15 knots diminishing to northwest 10 near noon then backing to west 10 early this evening. Wind increasing to southwest 15 Tuesday morning.

Scattered showers Tuesday evening with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 17 August 2026
Today Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less this afternoon then building to 0.5 to 1 near noon Tuesday.

Extended Forecast

Issued 03:00 AM EDT 17 August 2026
Wednesday Wind northwest 15 knots.
Thursday Wind northwest 15 knots diminishing to light.
Friday Wind 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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land station Land Station
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 17 August 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today departing trough located on a line
north-south over Vermont.

At 10:30 a.m. EDT today ridge located on a line northeast-southwest
over North Channel.
By 10:30 a.m. EDT Tuesday ridge located on a line
northeast-southwest over Lake Erie.

At 10:30 a.m. EDT today cold front located on a line
northeast-southwest over southern Manitoba.
By 10:30 a.m. EDT Tuesday cold front located on a line north-south
over Whitefish Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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