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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 15 September 2026

Tonight and Wednesday.

Strong wind warning in effect.

Wind southwest 25 knots diminishing to northwest 15 near midnight and to northwest 10 Wednesday morning. Wind becoming light Wednesday evening.

Scattered showers this evening.

Waves

Issued 06:30 PM EDT 15 September 2026
Tonight and Wednesday. Waves 2 metres subsiding to 0.5 to 1 late overnight and to 0.5 or less near noon Wednesday.

Extended Forecast

Issued 06:30 PM EDT 15 September 2026
Thursday Wind light becoming west 15 knots in the afternoon.
Friday Wind northwest 15 knots veering to northeast 15.
Saturday Wind southeast 15 knots.

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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

Northern Georgian Bay

Issued 10:11 PM EDT 15 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 15 September 2026 Tonight and Wednesday At 6:30 p.m. EDT tonight low 995 mb located over southern Hudson
Bay.
By 6:30 p.m. EDT Wednesday departing low 993 mb located over
northern Quebec.

At 6:30 p.m. EDT tonight ridge from 1029 mb high located on a line
northeast-southwest over the East Coast of the U.S.
By 6:30 p.m. EDT Wednesday merging ridge located from James Bay
to Pennsylvania.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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