Western Lake Ontario


Marine Forecast

Issued 03:00 AM EDT 17 August 2017

Today Tonight and Friday.

Strong wind warning in effect.

Wind southeast 10 knots increasing to southeast 15 this morning then backing to east 15 this afternoon. Wind veering to south 15 this evening then to southwest 15 Friday morning. Wind increasing to southwest 20 near noon Friday and to southwest 25 Friday evening.

Showers beginning this afternoon with a risk of thunderstorms changing to chance of showers Friday.


Issued 03:00 AM EDT 17 August 2017
Today Tonight and Friday. Waves one half metre or less building to one half to one metre near noon and to one and one half metres Friday afternoon.

Extended Forecast

Issued 03:00 AM EDT 17 August 2017
Saturday Wind southwest 20 knots.
Sunday Wind west 15 knots diminishing to light late in the day.
Monday Wind light becoming southwest 15 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 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

Western Lake Ontario

Issued 03:00 AM EDT 17 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.


Technical Marine Synopsis

Issued 3:00 AM EDT 17 August 2017 Today Tonight and Friday At 3:00 a.m. EDT today ridge located on a line north-south over
eastern Ontario.
By 3:00 a.m. EDT Friday ridge located on a line north-south
over Maine.

At 3:00 a.m. EDT today low 1000 mb located over southern Minnesota.
By 3:00 a.m. EDT Friday low 1000 mb located over northern Lake

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