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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 June 2026

Tonight and Saturday.

Wind southwest 10 knots increasing to southwest 15 early Saturday morning then diminishing to west 10 Saturday evening.

Showers and fog patches Saturday late in the day with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 12 June 2026
Tonight and Saturday. Waves 0.5 to 1 metre subsiding to 0.5 or less this evening then building to 0.5 to 1 Saturday morning.

Extended Forecast

Issued 06:30 PM EDT 12 June 2026
Sunday Wind light increasing to west 20 knots late in the day.
Monday Wind northwest 20 knots.
Tuesday Wind light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
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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 June 2026 Tonight and Saturday At 6:30 p.m. EDT tonight low 988 mb located over northeastern
Manitoba.
By 6:30 p.m. EDT Saturday low 999 mb located over Hudson Bay.

At 6:30 p.m. EDT tonight quasi-stationary trough located on a line
northwest-southeast over James Bay.

At 6:30 p.m. EDT tonight ridge located on a line northeast-southwest
over Ohio.
By 6:30 p.m. EDT Saturday ridge located on a line
northeast-southwest over West Virginia.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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