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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 June 2025

Tonight and Wednesday.

Wind southeast 15 knots diminishing to light this evening then becoming northeast 15 Wednesday evening.

Scattered showers this evening with a risk of thunderstorms. Scattered showers Wednesday late in the day with a risk of thunderstorms. Fog patches forming this evening and dissipating Wednesday evening.

Waves

Issued 06:30 PM EDT 17 June 2025
Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight.

Extended Forecast

Issued 06:30 PM EDT 17 June 2025
Thursday Wind northwest 20 knots diminishing to light late in the day.
Friday Wind light.
Saturday Wind southeast 15 knots veering to southwest 15.

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

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 17 June 2025 Tonight and Wednesday At 6:30 p.m. EDT tonight departing low 997 mb located south of
James Bay.

By 6:30 p.m. EDT Wednesday approaching low 1003 mb located over
southern Lower Michigan.

By 6:30 p.m. EDT Wednesday ridge located on a line
northwest-southeast over northern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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