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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EST 10 December 2025

Today Tonight and Thursday.

Wind south 15 knots veering to southwest 20 near noon then to northwest 25 early this evening. Wind backing to west 20 late overnight then veering to northwest 20 Thursday afternoon.

Snow or rain becoming rain near noon then scattered showers or scattered flurries this evening. Scattered flurries overnight and Thursday.

Risk of freezing spray overnight.

Waves

Issued 10:30 AM EST 10 December 2025
Today Tonight and Thursday. Waves 1 metre building to 2 this evening then subsiding to 1 early Thursday morning.

Extended Forecast

Issued 03:00 AM EST 10 December 2025
Friday Wind northwest 20 knots.
Saturday Wind southwest 15 knots increasing to southwest 20.
Sunday Wind southwest 20 knots veering to northwest 25.

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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 10 December 2025 Today Tonight and Thursday At 10:30 a.m. EST today low 989 mb located over southeastern
Michigan.
By 10:30 a.m. EST Thursday low 984 mb located over southeastern
Quebec.

At 10:30 a.m. EST today ridge located on a line north-south over
Saskatchewan.
By 10:30 a.m. EST Thursday ridge located on a line north-south
over northwestern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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