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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 15 September 2026

Today Tonight and Wednesday.

Wind south 15 knots diminishing to southwest 10 this evening then becoming light late overnight. Wind becoming north 15 Wednesday morning then diminishing to northeast 10 Wednesday evening.

Scattered showers this afternoon tonight and Wednesday morning. Risk of thunderstorms tonight.

Waves

Issued 10:30 AM EDT 15 September 2026
Today Tonight and Wednesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near midnight.

Extended Forecast

Issued 03:00 AM EDT 15 September 2026
Thursday Wind light becoming north 15 knots late in the day.
Friday Wind north 15 knots.
Saturday Wind east 15 knots.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Hamilton Munro Int'l Airport CFB Trenton Erieau Toronto City Centre Airport Point Pelee Peterborough Municipal Airport Burlington Lift Bridge Point Petre Cobourg Oshawa Executive Airport South Lake Huron - 45149 Port Colborne Brockville Gore Bay-Manitoulin Airport North Bay Airport Greater Sudbury Airport Killarney Sault Ste. Marie Airport Ajax - 45159 North Channel - 45154 Lake Nipissing - 45152 Lake Simcoe - 45151 Windsor Airport Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Welland-Pelham Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Sarnia Chris Hadfield Airport Vineland Station Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Tobermory
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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 10:30 AM EDT 15 September 2026 Today Tonight and Wednesday At 10:30 a.m. EDT today quasi-stationary ridge from 1030 mb high
located on a line northeast-southwest over the East Coast of
the U.S.

At 10:30 a.m. EDT today low 994 mb located southwest of Hudson Bay.
By 10:30 a.m. EDT Wednesday low 998 mb located over northern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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