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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 25 October 2026

Tonight and Monday.

Wind south 10 knots veering to southwest 10 near midnight then becoming light Monday morning. Wind becoming northeast 15 Monday afternoon.

Waves

Issued 06:30 PM EDT 25 October 2026
Tonight and Monday. Waves 0.5 metres or less.

Extended Forecast

Issued 06:30 PM EDT 25 October 2026
Tuesday Wind northeast 15 knots diminishing to light in the afternoon then becoming east 15 late in the day.
Wednesday Wind light.
Thursday Wind southwest 15 knots diminishing to light late in the day.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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land station Land Station
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 6:30 PM EDT 25 October 2026 Tonight and Monday At 6:30 p.m. EDT tonight departing ridge located on a line
northeast-southwest over the East Coast of the U.S.

At 6:30 p.m. EDT tonight cold front located on a line
northeast-southwest over North Channel.
By 6:30 p.m. EDT Monday cold front located on a line
northeast-southwest over the East Coast of the U.S.

By 10:30 a.m. EDT Monday high 1034 mb located over northwestern
Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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