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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 12 September 2026

Today Tonight and Sunday.

Strong wind warning in effect.

Wind south 10 knots veering to southwest 10 this afternoon then increasing to northwest 15 late overnight. Wind diminishing to light Sunday morning then increasing to northwest 15 Sunday afternoon. Wind increasing to northwest 20 Sunday evening.

Scattered showers this afternoon and this evening with a risk of thunderstorms. Scattered showers Sunday evening.

Waves

Issued 10:30 AM EDT 12 September 2026
Today Tonight and Sunday. Waves 0.5 metres or less building to 0.5 to 1 Sunday evening.

Extended Forecast

Issued 03:00 AM EDT 12 September 2026
Monday Wind north 15 knots diminishing to light in the morning then becoming southeast 15 late in the day.
Tuesday Wind south 20 knots.
Wednesday 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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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

Warnings (In effect)

Strong wind warning in effect

Lake St. Clair

Issued 10:30 AM EDT 12 September 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 12 September 2026 Today Tonight and Sunday At 10:30 a.m. EDT today departing ridge located on a line
northeast-southwest over Maine.

At 10:30 a.m. EDT today cold front from 993 mb low located on a
line northeast-southwest over central Lake Superior.
By 10:30 a.m. EDT Sunday cold front from 983 mb low located on a
line northeast-southwest over Lake Ontario.

By 10:30 a.m. EDT Sunday ridge located on a line northwest-southeast
over North Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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