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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 26 October 2026

Today Tonight and Tuesday.

Strong wind warning in effect.

Wind west 15 knots veering to northwest 15 early this evening then increasing to north 20 late this evening. Wind diminishing to northeast 15 late overnight and to northeast 10 Tuesday morning. Wind becoming light Tuesday afternoon then becoming east 10 Tuesday evening.

Scattered showers this afternoon.

Waves

Issued 10:30 AM EDT 26 October 2026
Today Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon Tuesday.

Extended Forecast

Issued 03:00 AM EDT 26 October 2026
Wednesday Wind light.
Thursday Wind south 15 knots veering to southwest 15 to 20.
Friday Wind west 15 knots diminishing to light late in the day.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas St. Catharines / Niagara District Airport Burlington Lift Bridge Point Pelee Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport Ajax - 45159 Erieau Lagoon City Collingwood Kingston Airport Grenadier Island Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Port Colborne North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 South Lake Huron - 45149 Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Windsor Airport Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Goderich Sarnia Chris Hadfield Airport Tobermory Long Point Harrow AAFC Port Weller Southeast Shoal Vineland Station Welland-Pelham
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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 10:30 AM EDT 26 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 10:30 AM EDT 26 October 2026 Today Tonight and Tuesday At 10:30 a.m. EDT today departing cold front located on a line
east-west over eastern Ontario.

At 10:30 a.m. EDT today high 1040 mb located over southern Manitoba.
By 10:30 a.m. EDT Tuesday ridge located on a line
northwest-southeast over Lake Nipissing.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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