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Eastern Lake Ontario


Marine Forecast

Issued 03:00 AM EDT 24 September 2021

Today Tonight and Saturday.

Strong wind warning in effect.

Wind south 20 knots veering to southwest 20 near noon then diminishing to southwest 15 early this evening. Wind diminishing to west 10 near midnight then backing to south 10 overnight. Wind increasing to south 15 Saturday morning and to southwest 20 Saturday evening.

Scattered showers today and this evening with a risk of waterspouts. Showers Saturday evening.


Issued 03:00 AM EDT 24 September 2021
Today Tonight and Saturday. Waves 1 metre building to 1.5 early this morning then subsiding to 1 early this evening. Waves subsiding to 0.5 or less overnight then building to 0.5 to 1 Saturday evening.

Extended Forecast

Issued 03:00 AM EDT 24 September 2021
Sunday Wind west 20 knots.
Monday Wind southwest 20 knots veering to northwest 15.
Tuesday Wind northwest 20 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 Killarney 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 Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 9 May 2021 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 03:00 AM EDT 24 September 2021

'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 24 September 2021 Today Tonight and Saturday At 3:00 a.m. EDT today low 1006 mb located over northern Lake Huron.
By 3:00 a.m. EDT Saturday low 1002 mb located over Hudson Bay.

At 3:00 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over Pennsylvania.

At 3:00 a.m. EDT today trough located on a line north-south over
northwestern Ontario.
By 3:00 a.m. EDT Saturday trough located over Lake Superior.

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