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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 09 September 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind west 20 knots veering to northwest 25 near midnight then diminishing to northwest 15 Thursday evening.

Scattered showers this evening with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 09 September 2026
Tonight and Thursday. Waves 1 to 1.5 metres.

Extended Forecast

Issued 06:30 PM EDT 09 September 2026
Friday Wind northwest 15 knots diminishing to light in the morning.
Saturday Wind south 15 knots.
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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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 09 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 9 September 2026 Tonight and Thursday At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over Nova Scotia.

At 6:30 p.m. EDT tonight low 980 mb located over southeastern
Hudson Bay.
By 6:30 p.m. EDT Thursday low 984 mb located over northern Quebec.

At 6:30 p.m. EDT tonight cold front from low located on a line
northeast-southwest over Georgian Bay.
By 6:30 p.m. EDT Thursday cold front from low located on a line
northeast-southwest over the East Coast of the U.S.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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