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Northern Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 14 November 2025

Tonight and Saturday.

Gale warning in effect.

Wind northeast 10 knots increasing to southeast 15 this evening and to southeast 20 late overnight. Wind veering to southwest 20 Saturday afternoon then increasing to northwest 35 Saturday evening.

Scattered showers Saturday.

Waves

Issued 06:30 PM EST 14 November 2025
Tonight and Saturday. Waves 0.5 metres or less building to 0.5 to 1 near midnight and to 1.5 early Saturday morning. Waves building to 2 Saturday evening.

Extended Forecast

Issued 06:30 PM EST 14 November 2025
Sunday Wind northwest 35 knots diminishing to northwest 25 late in the day.
Monday Wind northwest 25 knots.
Tuesday Wind northwest 15 knots diminishing to light.

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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)

Gale warning in effect

Northern Georgian Bay

Issued 6:30 PM EST 14 November 2025

'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. 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 6:30 PM EST 14 November 2025 Tonight and Saturday At 6:30 p.m. EST tonight ridge located on a line north-south over
Lake Ontario.
By 6:30 p.m. EST Saturday ridge located on a line north-south over
central Quebec.

At 6:30 p.m. EST tonight warm front located on a line north-south
over northern Ontario.
By 6:30 p.m. EST Saturday warm front located on a line north-south
over eastern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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