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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EST 12 December 2025

Tonight and Saturday.

Wind southwest 10 knots increasing to southwest 15 this evening then veering to west 20 early Saturday morning. Wind diminishing to west 15 Saturday afternoon then veering to northwest 20 Saturday evening.

Scattered flurries overnight Saturday morning and Saturday evening.

Waves

Issued 06:30 PM EST 12 December 2025
Tonight and Saturday. Waves 0.5 metres or less building to 0.5 to 1 Saturday morning then subsiding to 0.5 or less Saturday evening.

Extended Forecast

Issued 06:30 PM EST 12 December 2025
Sunday Wind northwest 20 knots increasing to northwest 25 in the morning then diminishing to west 15 late in the day.
Monday Wind west 15 knots increasing to southwest 25.
Tuesday Wind light becoming southwest 15 knots 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
Legend:
buoy Buoy
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 6:30 PM EST 12 December 2025 Tonight and Saturday At 6:30 p.m. EST tonight departing ridge located on a line
north-south over southern Ontario.

At 6:30 p.m. EST tonight low 1008 mb located over northern Ontario.
By 6:30 p.m. EST Saturday low 1010 mb located over northeastern
Ontario.

By 6:30 p.m. EST Saturday approaching ridge located on a line
north-south over North Dakota.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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