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Lake St. Clair

Forecast

Marine Forecast

Issued 06:30 PM EDT 09 June 2026

Tonight and Wednesday.

Wind south 10 knots veering to southwest 10 near midnight. Wind southwest 10 Wednesday.

Scattered showers ending Wednesday morning with a risk of thunderstorms. Scattered showers Wednesday afternoon and evening with a risk of thunderstorms. Fog patches forming near midnight and dissipating Wednesday morning.

Waves

Issued 06:30 PM EDT 09 June 2026
Tonight and Wednesday. Waves 0.5 metres or less.

Extended Forecast

Issued 06:30 PM EDT 09 June 2026
Thursday Wind light.
Friday Wind west 15 knots.
Saturday Wind light becoming southwest 15 knots late in the day.

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Weather Conditions

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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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 10 June 2026 Today Tonight and Thursday At 3:00 a.m. EDT today low 1008 mb located over Lake Huron.
By 3:00 a.m. EDT Thursday weakening low 1008 mb located over
southern Quebec.

At 3:00 a.m. EDT today low 994 mb located over southern Manitoba.
By 3:00 a.m. EDT Thursday low 987 mb located over northwestern
Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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