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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 19 August 2026

Today Tonight and Thursday.

Wind northwest 15 to 20 knots becoming northwest 15 early this morning then diminishing to northwest 10 Thursday morning. Wind backing to west 10 near noon Thursday.

Scattered showers ending early this morning with a risk of thunderstorms.

Waves

Issued 03:00 AM EDT 19 August 2026
Today Tonight and Thursday. Waves 1 metre subsiding to 0.5 or less Thursday morning.

Extended Forecast

Issued 03:00 AM EDT 19 August 2026
Friday Wind light becoming south 15 knots in the afternoon.
Saturday Wind south 15 knots becoming northwest 15 late in the day.
Sunday Wind northwest 15 knots increasing to northwest 20.

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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 3:00 AM EDT 19 August 2026 Today Tonight and Thursday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over New York State.
By 3:00 a.m. EDT Thursday ridge located from the Ontario - Manitoba
border to Iowa then to Lake Ontario.

At 3:00 a.m. EDT today cold front located on a line
northeast-southwest over Georgian Bay.
By 3:00 a.m. EDT Thursday cold front located on a line
northeast-southwest over the Gulf of St. Lawrence.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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