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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 13 September 2026

Today Tonight and Monday.

Strong wind warning in effect.

Wind southwest 10 knots veering to west 10 early this morning then increasing to northwest 15 this afternoon. Wind increasing to northwest 20 early this evening then diminishing to northwest 15 overnight. Wind diminishing to north 10 Monday morning then becoming light Monday afternoon. Wind becoming southeast 10 Monday evening.

Scattered showers this evening.

Waves

Issued 03:00 AM EDT 13 September 2026
Today Tonight and Monday. Waves 0.5 metres or less building to 0.5 to 1 early this evening then subsiding to 0.5 or less near noon Monday.

Extended Forecast

Issued 03:00 AM EDT 13 September 2026
Tuesday Wind light increasing to southwest 20 knots in the morning.
Wednesday Wind light.
Thursday 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 03:00 AM EDT 13 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 3:00 AM EDT 13 September 2026 Today Tonight and Monday At 3:00 a.m. EDT today departing cold front from 988 mb low located
on a line northeast-southwest over northern Lake Huron.

At 3:00 a.m. EDT today ridge located on a line northwest-southeast
over Minnesota.
By 3:00 a.m. EDT Monday approaching ridge located on a line
northwest-southeast over Wisconsin.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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