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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 04 September 2026

Tonight and Saturday.

Wind light becoming north 10 knots this evening then veering to northeast 10 near midnight. Wind increasing to north 15 Saturday afternoon.

Scattered showers this evening overnight and Saturday.

Waves

Issued 06:30 PM EDT 04 September 2026
Tonight and Saturday. Waves 0.5 metres or less.

Extended Forecast

Issued 06:30 PM EDT 04 September 2026
Sunday Wind light.
Monday Wind light.
Tuesday Wind light.

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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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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 4 September 2026 Tonight and Saturday At 6:30 p.m. EDT tonight low 1003 mb located over Nova Scotia.
By 6:30 p.m. EDT Saturday low 996 mb located east of Nova Scotia.

At 6:30 p.m. EDT tonight ridge located from Hudson Bay to Lake
Superior.
By 6:30 p.m. EDT Saturday ridge located on a line
northeast-southwest over northeastern Ontario.

At 6:30 p.m. EDT tonight trough located on a line north-south
over Saskatchewan.
By 6:30 p.m. EDT Saturday trough located on a line
northeast-southwest over northeastern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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