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Lake St. Clair


Marine Forecast

Issued 01:18 AM EDT 16 July 2024


Wind southwest 15 knots with gusts to 55 near thunderstorms. Wind becoming west 15 to 20 early Tuesday morning then diminishing to west 10 near noon Tuesday.

Showers early Tuesday morning with a risk of thunderstorms. Scattered showers late Tuesday afternoon and Tuesday evening with a risk of thunderstorms.


Issued 06:30 PM EDT 15 July 2024
Tonight and Tuesday. Waves 0.5 metres or less building to 0.5 to 1 early Tuesday morning then subsiding to 0.5 or less Tuesday afternoon.

Extended Forecast

Issued 06:30 PM EDT 15 July 2024
Wednesday Wind light.
Thursday Wind light becoming north 10 to 15 knots.
Friday Wind light.

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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 27 April 2024 Forecasts have ended for the season.

Watches (In effect)

Squall watch in effect

Lake St. Clair

Issued 01:03 AM EDT 16 July 2024 A cluster of thunderstorms over southern Michigan is moving east at 30 knots. Some of these thunderstorms have the potential to produce wind gusts up to 55 knots and frequent lightning early this morning.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.


Technical Marine Synopsis

Issued 6:30 PM EDT 15 July 2024 Tonight and Tuesday At 6:30 p.m. EDT tonight departing trough located from Quebec
to Pennsylvania.

At 6:30 p.m. EDT tonight trough located on a line
northeast-southwest over Lake Superior.
By 6:30 p.m. EDT Tuesday trough located on a line
northeast-southwest over eastern Ontario.

Great Lakes - Lake Huron Area

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