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Eastern Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 12 January 2026

Today Tonight and Tuesday.

Wind southwest 30 knots diminishing to southwest 20 early Tuesday morning then backing to south 10 to 15 near noon Tuesday. Wind increasing to south 20 Tuesday evening.

Scattered flurries ending near midnight. Showers Tuesday late in the day.

Waves

Issued 10:30 AM EST 12 January 2026
Today Tonight and Tuesday. Waves 3 metres subsiding to 2 early this evening and to 1.5 late overnight. Waves subsiding to 0.5 to 1 near noon Tuesday.

Extended Forecast

Issued 03:00 AM EST 12 January 2026
Wednesday Wind southwest 25 knots veering to northwest 20 in the afternoon.
Thursday Wind northwest 20 knots.
Friday Wind west 25 knots diminishing to south 15.

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Map of Great Lakes - Lake Huron marine weather areas Cove Island Goderich Oshawa Executive Airport CFB Trenton Western Islands Wiarton Airport Point Petre Lake Simcoe Regional Airport Parry Sound Harbour Toronto City Centre Airport Muskoka Airport Lagoon City Brockville Hamilton Munro Int'l Airport Sarnia Chris Hadfield Airport Tobermory Cobourg Harrow AAFC Long Point Port Weller Burlington Lift Bridge St. Catharines / Niagara District Airport Southeast Shoal Point Pelee Vineland Station Welland-Pelham Erieau Windsor Airport Port Colborne Killarney South Georgian Bay - 45143 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Lake St Clair - 45147 South Lake Huron - 45149 Sault Ste. Marie Airport Lake Simcoe - 45151 Collingwood Greater Sudbury Airport North Bay Airport Kingston Airport Peterborough Municipal Airport Grenadier Island Port Colborne - 45142 Great Duck Island Ajax - 45159 Gore Bay-Manitoulin Airport North Channel - 45154 Lake Nipissing - 45152
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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 10:30 AM EST 12 January 2026 Today Tonight and Tuesday At 10:30 a.m. EST today ridge located on a line north-south over
Montréal.
By 10:30 a.m. EST Tuesday ridge located on a line north-south over
New Brunswick.

At 10:30 a.m. EST today dissipating trough located on a line
north-south over northeastern Ontario.

At 10:30 a.m. EST today low 994 mb located over northern
Saskatchewan.
By 10:30 a.m. EST Tuesday low 992 mb located north of Lake Nipigon.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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