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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 19 June 2025

Today Tonight and Friday.

Wind northwest 15 to 20 knots diminishing to northwest 10 near noon then becoming light early this evening. Wind becoming southwest 10 near midnight. Wind southwest 10 Friday.

Scattered showers. Risk of thunderstorms today and early this evening and Friday afternoon and evening.

Waves

Issued 10:30 AM EDT 19 June 2025
Today Tonight and Friday. Waves 0.5 to 1 metre subsiding to 0.5 or less this afternoon.

Extended Forecast

Issued 03:00 AM EDT 19 June 2025
Saturday Wind light.
Sunday Wind light.
Monday Wind light.

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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 EDT 19 June 2025 Today Tonight and Friday At 10:30 a.m. EDT today low 999 mb located over southern Georgian
Bay.
By 10:30 a.m. EDT Friday low 996 mb located over northern New
Brunswick.

At 10:30 a.m. EDT today ridge located on a line east-west over
northern Ontario.
By 10:30 a.m. EDT Friday ridge located on a line northeast-southwest
over northeastern Ontario.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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