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Southern Georgian Bay

Forecast

Marine Forecast

Issued 10:30 AM EST 13 January 2026

Today Tonight and Wednesday.

Wind south 15 knots increasing to south 20 near noon then veering to southwest 20 early this evening. Wind veering to west 20 near midnight then to north 20 Wednesday morning. Wind increasing to north 25 Wednesday evening.

Scattered flurries changing to snow near noon then to scattered flurries or scattered showers this evening. Scattered showers near midnight becoming flurries Wednesday morning. Visibility 1 mile or less in flurries.

Risk of freezing spray Wednesday afternoon and evening.

Waves

Issued 10:30 AM EST 13 January 2026
Today Tonight and Wednesday. Waves 0.5 to 1 metre building to 1.5 this evening.

Extended Forecast

Issued 03:00 AM EST 13 January 2026
Thursday Wind north 25 knots diminishing to northwest 15 in the afternoon and to light late in the day.
Friday Wind southwest 25 knots.
Saturday Wind north 15 knots increasing to north 20 late in the day.

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Weather Conditions

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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 10:30 AM EST 13 January 2026 Today Tonight and Wednesday At 10:30 a.m. EST today low 989 mb located north of Lake Nipigon.
By 10:30 a.m. EST Wednesday low 991 mb located over central Quebec.

At 10:30 a.m. EST today cold front located on a line east-west
over Lake Winnipeg.
By 10:30 a.m. EST Wednesday cold front located on a line
northeast-southwest over Lake Simcoe.

By 10:30 a.m. EST Wednesday ridge located on a line north-south
over Lake of the Woods.

Great Lakes - Lake Huron Area

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