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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 18 July 2025

Today Tonight and Saturday.

Wind east 10 knots becoming light this afternoon then becoming south 10 late overnight. Wind increasing to northwest 15 Saturday evening.

Scattered showers Saturday afternoon and evening with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 18 July 2025
Today Tonight and Saturday. Waves less than 0.5 metres building to 0.5 or less early Saturday morning.

Extended Forecast

Issued 03:00 AM EDT 18 July 2025
Sunday Wind light becoming north 15 knots in the afternoon then diminishing to light late in the day.
Monday Wind light.
Tuesday Wind light.

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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 EDT 18 July 2025 Today Tonight and Saturday At 10:30 a.m. EDT today high 1022 mb located over Lake Huron.
By 10:30 a.m. EDT Saturday high 1020 mb located east of New
York State.

At 10:30 a.m. EDT today trough located on a line north-south over
North Dakota.
By 10:30 a.m. EDT Saturday trough located on a line
northeast-southwest over northeastern Ontario.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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