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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 09 December 2025

Tonight and Wednesday.

Wind southwest 20 knots diminishing to southwest 15 this evening then backing to south 20 late overnight. Wind veering to southwest 25 Wednesday morning then to northwest 25 Wednesday afternoon.

Scattered flurries changing to snow near midnight then to rain or snow Wednesday morning. Visibility 1 mile or less in snow.

Waves

Issued 06:30 PM EST 09 December 2025
Tonight and Wednesday. Waves 1 metre subsiding to 0.5 near midnight then building to 1 to 1.5 early Wednesday morning.

Extended Forecast

Issued 06:30 PM EST 09 December 2025
Thursday Wind northwest 20 knots.
Friday Wind light.
Saturday Wind light becoming west 15 knots late in the day.

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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 6:30 PM EST 9 December 2025 Tonight and Wednesday At 6:30 p.m. EST tonight dissipating low 1000 mb located over
Lake Superior.

At 6:30 p.m. EST tonight low 991 mb located over Minnesota.
By 6:30 p.m. EST Wednesday low 990 mb located over eastern Ontario.

At 6:30 p.m. EST tonight departing ridge located on a line
northeast-southwest over Maine.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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