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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 13 January 2026

Today Tonight and Wednesday.

Wind south 15 knots increasing to southwest 25 this afternoon and to southwest 30 this evening. Wind diminishing to southwest 20 late overnight and to southwest 15 Wednesday morning. Wind diminishing to northwest 10 Wednesday afternoon then increasing to northwest 15 Wednesday evening.

Scattered showers this afternoon and tonight. Scattered flurries Wednesday late in the day.

Waves

Issued 10:30 AM EST 13 January 2026
Today Tonight and Wednesday. Waves 1 metre building to 2 early this evening then subsiding to 1.5 early Wednesday morning. Waves subsiding to 1 near noon Wednesday and to 0.5 Wednesday evening.

Extended Forecast

Issued 03:00 AM EST 13 January 2026
Thursday Wind northwest 20 knots.
Friday Wind light increasing to southwest 20 knots.
Saturday Wind southwest 20 knots.

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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 13 January 2026 Today Tonight and Wednesday At 10:30 a.m. EST today low 989 mb located north of Lake Nipigon.
By 10:30 a.m. EST Wednesday low 991 mb located over central Quebec.

At 10:30 a.m. EST today cold front located on a line east-west
over Lake Winnipeg.
By 10:30 a.m. EST Wednesday cold front located on a line
northeast-southwest over Lake Simcoe.

By 10:30 a.m. EST Wednesday ridge located on a line north-south
over Lake of the Woods.

Great Lakes - Lake Huron Area

Another Region

Marine Weather for Canada

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