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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EST 15 January 2026

Today Tonight and Friday.

Wind northwest 25 knots diminishing to west 15 this afternoon and to southwest 10 this evening. Wind increasing to south 15 Friday morning then veering to southwest 20 Friday afternoon. Wind diminishing to southwest 15 Friday evening.

Flurries ending this afternoon. Flurries Friday. Visibility 1 mile or less in flurries.

Waves

Issued 03:00 AM EST 15 January 2026
Today Tonight and Friday. Over open water waves 0.5 to 1 metre subsiding to 0.5 or less early this evening then building to 0.5 to 1 Friday evening.

Extended Forecast

Issued 03:00 AM EST 15 January 2026
Saturday Wind southwest 15 knots increasing to southwest 20 late in the day.
Sunday Wind southwest 20 knots.
Monday Wind southwest 20 knots veering to west 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
Legend:
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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 3:00 AM EST 15 January 2026 Today Tonight and Friday At 3:00 a.m. EST today low 994 mb located south of Ontario.
By 3:00 a.m. EST Friday low 987 mb located over New Brunswick.

At 3:00 a.m. EST today ridge located on a line northeast-southwest
over northwestern Ontario.
By 3:00 a.m. EST Friday ridge located on a line north-south over
northeastern Ontario.

At 3:00 a.m. EST today trough located on a line north-south over
Saskatchewan.
By 3:00 a.m. EST Friday trough located on a line north-south over
northwestern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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