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Georgian Bay

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 17 July 2026

Today Tonight and Saturday.

Strong wind warning in effect.

Wind northeast 10 knots becoming light early this morning then becoming southeast 10 near noon. Wind increasing to southeast 15 this evening and to southwest 20 near midnight. Wind veering to west 20 Saturday morning then to northwest 20 Saturday afternoon.

Scattered showers overnight and Saturday with a risk of thunderstorms. Smoke dissipating Saturday morning. Visibility as low as 1 mile in smoke.

Waves

Issued 03:00 AM EDT 17 July 2026
Today Tonight and Saturday. Waves 0.5 metres or less building to 1 near midnight and to 1.5 near noon Saturday.

Extended Forecast

Issued 03:00 AM EDT 17 July 2026
Sunday Wind north 20 knots diminishing to light in the afternoon then becoming west 15 late in the day.
Monday Wind west 15 knots backing to southwest 20 late in the day.
Tuesday Wind southwest 20 knots veering to northwest 20.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas CFB Trenton Port Colborne - 45142 Hamilton Munro Int'l Airport Oshawa Executive Airport Port Stanley - 45132 Lake Nipissing - 45152 Point Petre Georgian Bay - 45137 Toronto City Centre Airport Lake Simcoe - 45151 South Georgian Bay - 45143 Prince Edward Point - 45135 Peterborough Municipal Airport South Lake Huron - 45149 Collingwood Lake St Clair - 45147 Grimsby - 45139 Goderich Lagoon City Kingston Airport Muskoka Airport Parry Sound Harbour Grenadier Island Lake Simcoe Regional Airport Wiarton Airport Brockville Western Islands Cove Island Great Duck Island North Channel - 45154 Sarnia Chris Hadfield Airport Gore Bay-Manitoulin Airport Tobermory Harrow AAFC Long Point North Bay Airport Port Weller St. Catharines / Niagara District Airport Greater Sudbury Airport Southeast Shoal Vineland Station Port Colborne Erieau Cobourg Sault Ste. Marie Airport Windsor Airport Welland-Pelham Killarney Ajax - 45159 Point Pelee Burlington Lift Bridge
Legend:
buoy Buoy
land station Land Station
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 03:00 AM EDT 17 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 3:00 AM EDT 17 July 2026 Today Tonight and Saturday At 3:00 a.m. EDT today ridge located on a line north-south over
Michigan.
By 3:00 a.m. EDT Saturday ridge located on a line
northeast-southwest over New England.

At 3:00 a.m. EDT today low 1010 mb located over South Dakota.
By 3:00 a.m. EDT Saturday low 1003 mb located over northeastern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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