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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 12 September 2026

Tonight and Sunday.

Strong wind warning in effect.

Wind south 15 knots veering to west 15 this evening then to northwest 15 early Sunday morning. Wind increasing to west 20 near noon Sunday then veering to northwest 25 Sunday evening.

Scattered showers this evening with a risk of thunderstorms. Scattered showers Sunday evening.

Waves

Issued 06:30 PM EDT 12 September 2026
Tonight and Sunday. Waves 0.5 to 1 metre building to 1 to 1.5 Sunday afternoon and to 2 Sunday evening.

Extended Forecast

Issued 06:30 PM EDT 12 September 2026
Monday Wind northwest 20 knots diminishing to light in the afternoon.
Tuesday Wind south 30 knots.
Wednesday Wind southwest 15 knots diminishing to 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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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 12 September 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 12 September 2026 Tonight and Sunday At 6:30 p.m. EDT tonight departing ridge located south of Nova
Scotia.

At 6:30 p.m. EDT tonight cold front from 992 mb low located on a
line northeast-southwest over northern Lower Michigan.
By 6:30 p.m. EDT Sunday cold front from 986 mb low located from
Montréal to Erie.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over South Dakota.
By 6:30 p.m. EDT Sunday ridge located on a line northwest-southeast
over Minnesota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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