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Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 08 October 2024

Today Tonight and Wednesday.

Strong wind warning in effect.

Wind northwest 15 knots increasing to northwest 20 Wednesday afternoon.

Scattered showers. Risk of waterspouts today and Wednesday afternoon and evening.

Waves

Issued 10:30 AM EDT 08 October 2024
Today Tonight and Wednesday. Waves 0.5 to 1 metre.

Extended Forecast

Issued 03:00 AM EDT 08 October 2024
Thursday Wind northwest 15 knots.
Friday Wind southwest 15 knots increasing to southwest 25.
Saturday Wind southwest 25 knots veering to northwest 20.

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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 27 April 2024 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Lake Ontario

Issued 10:30 AM EDT 08 October 2024

'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.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 8 October 2024 Today Tonight and Wednesday At 10:30 a.m. EDT today low 998 mb located over James Bay.
By 10:30 a.m. EDT Wednesday low 1011 mb located southeast of
James Bay.

At 10:30 a.m. EDT today ridge located on a line north-south over
the Ontario - Manitoba border.
By 10:30 a.m. EDT Wednesday ridge located on a line north-south
over Lake Nipigon.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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