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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 11:24 PM EST 18 November 2025

Tonight and Wednesday.

Wind northeast 10 knots becoming light early Wednesday morning.

Waves

Issued 06:30 PM EST 18 November 2025
Tonight and Wednesday. Waves 0.5 metres or less.

Extended Forecast

Issued 06:30 PM EST 18 November 2025
Thursday Wind light increasing to southwest 20 knots late in the day.
Friday Wind southwest 20 knots veering to northwest 20.
Saturday Wind light becoming south 15 knots late in the day.

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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 EST 18 November 2025 Tonight and Wednesday At 6:30 p.m. EST tonight high 1020 mb located over Lake Superior.
By 6:30 p.m. EST Wednesday high 1026 mb located over southern
Ontario.

At 6:30 p.m. EST tonight low 1011 mb located over southern Missouri.
By 6:30 p.m. EST Wednesday departing low 1018 mb located over the
East Coast of the U.S.

By 6:30 p.m. EST Wednesday approaching trough located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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