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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 August 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind variable 10 knots becoming southeast 10 this evening then increasing to southeast 20 near midnight. Wind diminishing to southeast 15 Sunday morning and to southeast 10 Sunday afternoon. Wind becoming variable 10 Sunday evening.

Showers Sunday afternoon and evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 15 August 2026
Tonight and Sunday. Waves 0.5 metres or less building to 1 to 1.5 late overnight then subsiding to 0.5 to 1 near noon Sunday. Waves subsiding to 0.5 or less Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 15 August 2026
Monday Wind light becoming north 15 knots in the morning.
Tuesday Wind light becoming southwest 15 knots.
Wednesday Wind northwest 15 knots.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
Legend:
buoy Buoy
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

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 6:30 PM EDT 15 August 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 15 August 2026 Tonight and Sunday At 6:30 p.m. EDT tonight departing ridge located on a line
north-south over eastern Ontario.

At 6:30 p.m. EDT tonight trough located on a line north-south over
northwestern Ontario.
By 6:30 p.m. EDT Sunday trough located on a line northwest-southeast
over North Channel.

At 6:30 p.m. EDT Sunday approaching trough located on a line
northeast-southwest over Lake Erie.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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