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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 15 February 2026

Today Tonight and Monday.

Wind northeast 15 knots veering to east 15 this morning then backing to northeast 15 this afternoon. Wind diminishing to northeast 10 near midnight then becoming light Monday morning.

Scattered flurries tonight. Scattered showers Monday evening.

Waves

Issued 03:00 AM EST 15 February 2026
Today Tonight and Monday. Over open water waves 0.5 metres or less building to 0.5 to 1 early this morning then subsiding to 0.5 or less overnight.

Extended Forecast

Issued 03:00 AM EST 15 February 2026
Tuesday Wind southwest 15 knots diminishing to light in the morning.
Wednesday Wind east 20 knots.
Thursday Wind northeast 15 knots.

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

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

Ice Forecasts

Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EST 15 February 2026 Today Tonight and Monday At 3:00 a.m. EST today ridge located on a line northeast-southwest
over eastern Ontario.
By 3:00 a.m. EST Monday departing ridge located on a line
north-south over Maine.

At 3:00 a.m. EST today trough located on a line north-south over
Lake Superior.
By 3:00 a.m. EST Monday dissipating trough located on a line
north-south over eastern Lake Ontario.

At 3:00 a.m. EST today trough located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Monday approaching trough located on a line
northeast-southwest over Thunder Bay.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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