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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 16 December 2025

Today Tonight and Wednesday.

Wind southwest 20 knots increasing to southwest 30 this evening then veering to west 30 Wednesday morning. Wind diminishing to west 20 Wednesday afternoon and to west 15 Wednesday evening.

Scattered flurries ending this afternoon with a risk of freezing drizzle. Scattered showers overnight and Wednesday morning. Risk of freezing drizzle late overnight.

Waves

Issued 03:00 AM EST 16 December 2025
Today Tonight and Wednesday. Waves 1 to 1.5 metres building to 2 early this evening then subsiding to 1 to 1.5 Wednesday evening.

Extended Forecast

Issued 03:00 AM EST 16 December 2025
Thursday Wind south 25 knots veering to southwest 30 late in the day.
Friday Wind southwest 30 knots diminishing to light late in the day.
Saturday Wind light becoming southwest 15 knots.

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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 3:00 AM EST 16 December 2025 Today Tonight and Wednesday At 3:00 a.m. EST today ridge located on a line northeast-southwest
over North Carolina.
By 3:00 a.m. EST Wednesday ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 3:00 a.m. EST today low 987 mb located over eastern Saskatchewan.
By 3:00 a.m. EST Wednesday trough from low located on a line
northeast-southwest over Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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