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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 21 July 2026

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind west 15 knots increasing to west 20 this afternoon then veering to northwest 25 early this evening. Wind diminishing to northwest 15 Wednesday evening.

Scattered showers ending near noon Wednesday. Risk of thunderstorms today.

Waves

Issued 10:30 AM EDT 21 July 2026
Today Tonight and Wednesday. Waves 1 to 1.5 metres building to 2 this evening then subsiding to 1 Wednesday afternoon.

Extended Forecast

Issued 03:00 AM EDT 21 July 2026
Thursday Wind northwest 15 knots diminishing to light in the morning.
Friday Wind southwest 15 knots diminishing to light late in the day.
Saturday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 10:30 AM EDT 21 July 2026

'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.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 21 July 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today trough from 991 mb low located on a line
north-south over North Channel.
By 10:30 a.m. EDT Wednesday trough from 993 mb low located on a
line north-south over New Hampshire.

At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over Saskatchewan.
By 10:30 a.m. EDT Wednesday ridge located on a line
northwest-southeast over South Dakota.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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