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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 10 October 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind northeast 10 knots veering to east 10 early this morning then increasing to east 15 near noon. Wind veering to southeast 15 near midnight then increasing to southeast 20 overnight. Wind diminishing to southeast 15 near noon Sunday and to east 10 Sunday evening.

Rain Sunday late in the day.

Waves

Issued 03:00 AM EDT 10 October 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 overnight then subsiding to 0.5 or less Sunday afternoon.

Extended Forecast

Issued 03:00 AM EDT 10 October 2026
Monday Wind light becoming southwest 15 knots late in the day.
Tuesday Wind southwest 15 knots becoming northeast 15.
Wednesday Wind northeast 15 knots diminishing to light.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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Ice Conditions

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

Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Strong wind warning in effect

Eastern Lake Ontario

Issued 09:16 AM EDT 10 October 2026

'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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 10 October 2026 Today Tonight and Sunday At 3:00 a.m. EDT today ridge from 1028 mb high located on a line
northwest-southeast over central Ontario.
By 3:00 a.m. EDT Sunday departing ridge from 1034 mb high located
on a line north-south over Maine.

By 3:00 a.m. EDT Sunday approaching trough located on a line
northeast-southwest over northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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