Eastern Lake Ontario


Marine Forecast

Issued 06:30 PM EDT 27 June 2017

Tonight and Wednesday.

Strong wind warning in effect.

Wind west 20 knots diminishing to west 10 late overnight then increasing to southwest 15 near noon Wednesday. Wind diminishing to southwest 10 Wednesday evening.

Chance of showers early this evening with a risk of thunderstorms. Chance of showers beginning Wednesday evening.


Issued 06:30 PM EDT 27 June 2017
Tonight and Wednesday. Waves one metre building to one and one half metres this evening then subsiding to one half to one metre early Wednesday morning.

Extended Forecast

Issued 06:30 PM EDT 27 June 2017
Thursday Wind light increasing to south 15 knots in the morning then veering to southwest 20 late in the day.
Friday Wind southwest 20 knots diminishing to light late in the day.
Saturday Wind southwest 15 knots.

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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.

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 6:30 PM EDT 27 June 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 27 June 2017 Tonight and Wednesday At 6:30 p.m. EDT tonight departing trough located on a line
north-south over New England.

At 6:30 p.m. EDT tonight ridge located on a line northwest-southeast
over Indiana.
By 6:30 p.m. EDT Wednesday ridge located on a line
northeast-southwest over Virginia.

At 6:30 p.m. EDT tonight low 1006 mb located over northern Ontario.
By 6:30 p.m. EDT Wednesday low 1009 mb located over central Quebec.

At 6:30 p.m. EDT Wednesday approaching low 994 mb located over

Great Lakes - Lake Erie and Lake Ontario Area

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