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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 17 July 2026

Today Tonight and Saturday.

Wind light becoming southeast 10 knots this afternoon then increasing to southwest 15 near midnight. Wind becoming north 15 Saturday afternoon.

Scattered showers tonight and Saturday with a risk of thunderstorms. Smoke dissipating Saturday morning. Visibility as low as 1 mile in smoke.

Waves

Issued 10:30 AM EDT 17 July 2026
Today Tonight and Saturday. Waves less than 0.5 metres building to 0.5 late overnight.

Extended Forecast

Issued 03:00 AM EDT 17 July 2026
Sunday Wind north 15 knots diminishing to light in the morning.
Monday Wind light becoming southwest 15 knots late in the day.
Tuesday Wind southwest 15 knots veering to northwest 15 late in the day.

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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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 17 May 2026 Forecasts have ended for the season.
Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 17 July 2026 Today Tonight and Saturday At 10:30 a.m. EDT today ridge located on a line north-south over
southern Ontario.
By 10:30 a.m. EDT Saturday ridge located on a line
northeast-southwest over the Eastern Seaboard.

At 10:30 a.m. EDT today low 1010 mb located over northwestern
Ontario.
By 10:30 a.m. EDT Saturday low 999 mb located north of Lake
Nipissing.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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