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Georgian Bay


Marine Forecast

Issued 03:00 AM EDT 21 September 2021

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind south 20 knots veering to west 20 this afternoon then to northwest 20 early this evening. Wind veering to north 20 near midnight then increasing to north 30 Wednesday morning.

Showers or scattered thunderstorms with a risk of thunderstorms this morning changing to rain Wednesday morning. Visibility 1 mile or less in rain.


Issued 03:00 AM EDT 21 September 2021
Today Tonight and Wednesday. Waves one metre building to one and one half metres near noon and to 2 near noon Wednesday.

Extended Forecast

Issued 03:00 AM EDT 21 September 2021
Thursday Wind northeast 25 knots diminishing to south 15 late in the day.
Friday Wind southwest 15 knots backing to south 20.
Saturday Wind south 25 knots diminishing to southwest 15.

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Map of Great Lakes - Lake Huron marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 9 May 2021 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 03:00 AM EDT 21 September 2021

'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.


Technical Marine Synopsis

Issued 3:00 AM EDT 21 September 2021 Today Tonight and Wednesday At 3:00 a.m. EDT today trough located on a line northeast-southwest
over eastern Lake Superior.
By 3:00 a.m. EDT Wednesday trough located on a line
northeast-southwest over southern Lake Huron.

At 3:00 a.m. EDT today departing ridge located on a line
northeast-southwest over the Maritimes.

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