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Northern Georgian Bay


Marine Forecast

Issued 03:00 AM EDT 25 October 2021

Today Tonight and Tuesday.

Gale warning in effect.

Wind northeast 15 knots increasing to northeast 20 early this morning and to northeast 35 this afternoon. Wind diminishing to northeast 30 overnight and to northeast 15 Tuesday evening.

Scattered showers this afternoon tonight and Tuesday.


Issued 03:00 AM EDT 25 October 2021
Today Tonight and Tuesday. Waves 0.5 metres building to 1 this morning and to 2 early this evening. Waves subsiding to 1.5 near noon Tuesday and to 1 Tuesday evening.

Extended Forecast

Issued 03:00 AM EDT 25 October 2021
Wednesday Wind northeast 15 knots.
Thursday Wind east 15 knots veering to southeast 20.
Friday Wind east 20 knots.

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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)

Gale warning in effect

Northern Georgian Bay

Issued 03:00 AM EDT 25 October 2021

'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.


Technical Marine Synopsis

Issued 3:00 AM EDT 25 October 2021 Today Tonight and Tuesday At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EDT Tuesday ridge located on a line northeast-southwest
over northern Ontario.

At 3:00 a.m. EDT today low 1000 mb located over Illinois.
By 3:00 a.m. EDT Tuesday low 1003 mb located over Pennsylvania.

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