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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 12 February 2026

Tonight and Friday.

Wind northwest 15 knots diminishing to northwest 10 near midnight then increasing to west 15 early Friday morning. Wind backing to southwest 15 to 20 near noon Friday then increasing to southwest 25 Friday evening.

Snow Friday evening. Visibility 1 mile or less in snow.

Waves

Issued 06:30 PM EST 12 February 2026
Tonight and Friday. Over open water waves 0.5 metres building to 1 Friday afternoon and to 1 to 1.5 Friday evening.

Extended Forecast

Issued 06:30 PM EST 12 February 2026
Saturday Wind west 25 knots diminishing to west 15 in the morning and to light late in the day.
Sunday Wind east 15 knots.
Monday Wind southwest 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 6:30 PM EST 12 February 2026 Tonight and Friday At 6:30 p.m. EST tonight departing trough located on a line
northeast-southwest over eastern Ontario.

At 6:30 p.m. EST tonight high 1027 mb located over Michigan.
By 6:30 p.m. EST Friday high 1029 mb located over West Virginia.

At 6:30 p.m. EST tonight low 1010 mb located over northeastern
Manitoba.
By 6:30 p.m. EST Friday low 1010 mb located over southern Quebec.

At 6:30 p.m. EST tonight ridge located on a line north-south over
southern Saskatchewan.
By 6:30 p.m. EST Friday ridge 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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