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Lake St. Clair


Marine Forecast

Issued 10:30 AM EDT 30 July 2021

Today Tonight and Saturday.

Wind north 15 knots diminishing to north 10 early this evening then becoming light near midnight. Wind becoming southwest 10 near noon Saturday then increasing to southwest 15 Saturday evening.

Showers Saturday evening with a risk of thunderstorms.


Issued 10:30 AM EDT 30 July 2021
Today Tonight and Saturday. Waves one half to one metre subsiding to one half metre or less this evening and to less than one half metre late overnight. Waves building to one half metre Saturday evening.

Extended Forecast

Issued 03:00 AM EDT 30 July 2021
Sunday Wind north 15 knots diminishing to light late in the day.
Monday Wind light.
Tuesday Wind light.

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Weather Conditions

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Map of Great Lakes - Lake Huron marine weather areas N Huron - 45003 W Erie - 45005 S Huron - 45008 Lake Ontario - 45012 Port Stanley - 45132 Prince Edward Point - 45135 Georgian Bay - 45137 Grimsby - 45139 Port Colborne - 45142 South Georgian Bay - 45143 Lake St Clair - 45147 South Lake Huron - 45149 Lake Simcoe - 45151 Lake Nipissing - 45152 North Channel - 45154 Ajax - 45159 Sault Ste. Marie Airport Killarney Greater Sudbury Airport North Bay Airport Gore Bay-Manitoulin Airport Great Duck Island Brockville Grenadier Island Kingston Airport Collingwood Lagoon City Muskoka Airport Parry Sound Harbour Lake Simcoe Regional Airport Wiarton Airport Western Islands Cove Island Goderich Sarnia Chris Hadfield Airport Tobermory Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Southeast Shoal Vineland Station Welland-Pelham Windsor Airport Port Colborne Erieau Point Pelee Burlington Lift Bridge Cobourg Hamilton Munro Int'l Airport Oshawa Executive Airport Point Petre Toronto City Centre Airport CFB Trenton Peterborough Municipal Airport
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 9 May 2021 Forecasts have ended for the season.

No watches or warnings in effect.


Technical Marine Synopsis

Issued 10:30 AM EDT 30 July 2021 Today Tonight and Saturday At 10:30 a.m. EDT today high 1023 mb located over Wisconsin.
By 10:30 a.m. EDT Saturday high 1018 mb located over Ohio.

At 10:30 a.m. EDT today low 1010 mb located over western Hudson Bay.
By 10:30 a.m. EDT Saturday low 1012 mb located near Lake Nipigon.

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