Western Lake Ontario


Marine Forecast

Issued 06:30 PM EDT 19 October 2017

Tonight and Friday.

Strong wind warning in effect.

Wind west 20 knots diminishing to west 15 near midnight and to light Friday morning.


Issued 06:30 PM EDT 19 October 2017
Tonight and Friday. Waves one metre subsiding to less than one half metre near noon Friday.

Extended Forecast

Issued 06:30 PM EDT 19 October 2017
Saturday Wind light.
Sunday Wind light becoming south 15 knots late in the day.
Monday Wind south 15 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 Executive 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

Western Lake Ontario

Issued 6:30 PM EDT 19 October 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.


Technical Marine Synopsis

Issued 6:30 PM EDT 19 October 2017 Tonight and Friday At 6:30 p.m. EDT tonight high 1025 mb located over western North
By 6:30 p.m. EDT Friday high 1024 mb located over Pennsylvania.

At 6:30 p.m. EDT tonight departing low 987 mb located over eastern
Hudson Bay.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over Lake Superior.
By 6:30 p.m. EDT Friday ridge located from Hudson Bay to Montréal
then to Pennsylvania.

By 6:30 p.m. EDT Friday low 986 mb located over southern

Great Lakes - Lake Erie and Lake Ontario Area

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What we are doing


Summer 2017: Significant weather across Canada

By analyzing weather events, ECCC is collecting more information as to how our climate is changing.

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