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Southern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 13 November 2025

Today Tonight and Friday.

Strong wind warning in effect.

Wind northwest 25 knots diminishing to northwest 15 this evening and to north 10 Friday morning. Wind veering to northeast 10 Friday afternoon then to southeast 10 Friday evening.

Scattered showers ending Friday morning.

Waves

Issued 03:00 AM EST 13 November 2025
Today Tonight and Friday. Waves 2 metres subsiding to 1.5 this afternoon and to 1 near midnight. Waves subsiding to 0.5 or less near noon Friday.

Extended Forecast

Issued 03:00 AM EST 13 November 2025
Saturday Wind southeast 15 knots increasing to southeast 20 in the morning then becoming west 20 late in the day.
Sunday Wind northwest 30 knots.
Monday Wind northwest 25 knots diminishing to northwest 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

Warnings (In effect)

Strong wind warning in effect

Southern Georgian Bay

Issued 03:00 AM EST 13 November 2025

'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 or Weatheradio stations.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 13 November 2025 Today Tonight and Friday At 3:00 a.m. EST today departing trough located on a line
northeast-southwest over eastern Quebec.

At 3:00 a.m. EST today ridge located on a line northwest-southeast
over Iowa.
By 3:00 a.m. EST Friday ridge located on a line northwest-southeast
over eastern Lake Superior.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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