Northern Georgian Bay


Marine Forecast

Issued 12:52 PM EDT 22 August 2017

Today Tonight and Wednesday.

Strong wind warning in effect. Squall watch in effect.

Wind northwest 25 knots with gusts to 35 near thunderstorms. Wind becoming northwest 30 early this evening then diminishing to northwest 20 early Wednesday morning. Wind diminishing to northwest 15 near noon Wednesday.

A few showers with a risk of thunderstorms changing to chance of showers tonight and Wednesday morning.


Issued 10:30 AM EDT 22 August 2017
Today Tonight and Wednesday. Waves one metre building to one and one half metres early this afternoon and to 2 this evening. Waves subsiding to one Wednesday morning.

Extended Forecast

Issued 03:00 AM EDT 22 August 2017
Thursday Wind northwest 15 knots diminishing to light in the morning.
Friday Wind light.
Saturday Wind light.

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Weather Conditions

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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 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 Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Port Weller St. Catharines Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Municipal Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport Killarney Western Islands Cove Island Long Point Port Colborne Erieau Point Pelee
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 27 April 2017 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Georgian Bay

Issued 12:52 PM EDT 22 August 2017

'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.

Watches (In effect)

Squall watch in effect

Northern Georgian Bay

Issued 12:52 PM EDT 22 August 2017 Conditions are favourable for the development of squalls with wind gusts up to 35 knots.

Showers and isolated thunderstorms along a cold front located over Northern Lake Huron will move through the area this afternoon.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.


Technical Marine Synopsis

Issued 10:30 AM EDT 22 August 2017 Today Tonight and Wednesday At 10:30 a.m. EDT today deepening low 999 mb located 100 miles
north of Lake Nipissing.
By 10:30 a.m. EDT Wednesday deepening low 985 mb located east of
James Bay.

At 10:30 a.m. EDT today trough from low located on a line
northeast-southwest over northern Lake Huron.
By 10:30 a.m. EDT Wednesday trough located on a line
northeast-southwest over the Eastern Seaboard.

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