Northern Georgian Bay


Marine Forecast

Issued 11:17 AM EDT 27 April 2017

Today Tonight and Friday

Special marine watch in effect.

Wind southeast 20 knots veering to southwest 15 early this evening.

A few showers and scattered thunderstorms beginning this afternoon and ending near midnight.


Issued 10:30 AM EDT 27 April 2017
Today Tonight and Friday Waves one metre building to one and one half metres near noon then subsiding to one this evening.

Extended Forecast

Issued 03:00 AM EDT 27 April 2017
Saturday Wind light becoming northwest 15 knots in the morning then diminishing to light late in the day.
Sunday Wind northeast 15 knots increasing to northeast 20.
Monday Wind southeast 25 knots.

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Weather Conditions

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Map of Great Lakes - Lake Erie and Lake Ontario 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.

Watches (In effect)

Special marine watch in effect

Northern Georgian Bay

Issued 11:16 AM EDT 27 April 2017 Conditions are favourable for the development of thunderstorms this afternoon.

Wind gusts up to 34 knots, frequent lightning, small hail and poor visibility in thunderstorms heavy at times are possible.

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 27 April 2017 Today Tonight and Friday At 10:30 a.m. EDT today low 992 mb located over northern Lake
By 10:30 a.m. EDT Friday low 988 mb located over James Bay.

At 10:30 a.m. EDT today trough from low located on a line
north-south over Lake Michigan.
By 10:30 a.m. EDT Friday trough from low located on a line
northwest-southeast over southeastern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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