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Lake St. Clair

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Forecast

Marine Forecast

Issued 10:30 AM EST 06 December 2025

Today Tonight and Sunday.

Wind west 15 knots diminishing to west 10 this afternoon then becoming light this evening. Wind becoming northwest 10 near noon Sunday then increasing to northwest 15 Sunday afternoon. Wind veering to north 20 Sunday evening.

Flurries Sunday. Visibility 1 mile or less in flurries.

Waves

Issued 10:30 AM EST 06 December 2025
Today Tonight and Sunday. Waves 0.5 to 1 metre subsiding to 0.5 or less early this evening.

Extended Forecast

Issued 03:00 AM EST 06 December 2025
Monday Wind northwest 15 knots diminishing to light in the morning.
Tuesday Wind southwest 15 knots increasing to southwest 20.
Wednesday Wind northeast 20 knots backing to northwest 25 late in the day.

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Map of Great Lakes - Lake Erie and Lake Ontario marine weather areas Harrow AAFC Burlington Lift Bridge Oshawa Executive Airport Point Pelee Peterborough Municipal Airport Point Petre Hamilton Munro Int'l Airport Erieau Cobourg Toronto City Centre Airport Port Colborne CFB Trenton South Lake Huron - 45149 Windsor Airport Great Duck Island 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 Welland-Pelham Lake St Clair - 45147 South Georgian Bay - 45143 Port Colborne - 45142 Grimsby - 45139 Georgian Bay - 45137 Prince Edward Point - 45135 Port Stanley - 45132 Vineland Station Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Cove Island Goderich Sarnia Chris Hadfield Airport Western Islands Tobermory Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal
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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 16 May 2025 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EST 6 December 2025 Today Tonight and Sunday At 10:30 a.m. EST today departing cold front located on a line
northeast-southwest over Lake Nipissing.

At 10:30 a.m. EST today disturbance located over Kansas.
By 10:30 a.m. EST Sunday low 1015 mb located south of Georgian Bay.

At 10:30 a.m. EST today ridge located on a line northwest-southeast
over Saskatchewan.
By 10:30 a.m. EST Sunday ridge located on a line northwest-southeast
over southern Manitoba.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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