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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 August 2026

Tonight and Thursday.

Wind west 10 knots becoming variable 10 near midnight then becoming light early Thursday morning. Wind becoming northwest 10 Thursday afternoon then becoming light Thursday evening.

Waves

Issued 06:30 PM EDT 12 August 2026
Tonight and Thursday. Waves 0.5 metres.

Extended Forecast

Issued 06:30 PM EDT 12 August 2026
Friday Wind northeast 15 knots diminishing to light in the afternoon then becoming north 15 late in the day.
Saturday Wind northeast 15 knots diminishing to light.
Sunday Wind southeast 15 knots becoming northwest 15 late in the day.

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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 6:30 PM EDT 12 August 2026 Tonight and Thursday At 6:30 p.m. EDT tonight quasi-stationary trough located over Iowa
to Michigan.

At 6:30 p.m. EDT tonight quasi-stationary ridge located on a line
northwest-southeast over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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