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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 10:30 AM EDT 16 August 2026

Today Tonight and Monday.

Wind southwest 10 knots veering to west 10 early this evening then increasing to northwest 15 near midnight. Wind diminishing to northwest 10 near noon Monday then becoming light Monday evening.

Scattered showers ending overnight with a risk of thunderstorms.

Waves

Issued 10:30 AM EDT 16 August 2026
Today Tonight and Monday. Waves less than 0.5 metres.

Extended Forecast

Issued 03:00 AM EDT 16 August 2026
Tuesday Wind light.
Wednesday Wind southwest 15 knots diminishing to light.
Thursday Wind light.

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Map of Great Lakes - Lake Huron marine weather areas Erieau CFB Trenton Muskoka Airport Parry Sound Harbour Toronto City Centre Airport Lake Simcoe Regional Airport Wiarton Airport Point Petre Lagoon City Western Islands Cobourg Port Colborne Windsor Airport Point Pelee Welland-Pelham Vineland Station Burlington Lift Bridge Southeast Shoal St. Catharines / Niagara District Airport Goderich Port Weller Long Point Harrow AAFC Hamilton Munro Int'l Airport Tobermory Sarnia Chris Hadfield Airport Oshawa Executive Airport Collingwood 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 Peterborough Municipal Airport Brockville Grenadier Island Kingston Airport
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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

Watches (In effect)

Squall watch in effect

Lake St. Clair

Issued 11:21 AM EDT 16 August 2026 Scattered thunderstorms are expected to cross the lake this afternoon into this evening. Some of these storms are possible to produce wind gusts up to 35 knots.

Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.

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

Synopsis

Technical Marine Synopsis

Issued 10:30 AM EDT 16 August 2026 Today Tonight and Monday At 10:30 a.m. EDT today trough located on a line north-south over
Lower Michigan.
By 10:30 a.m. EDT Monday trough located on a line north-south over
eastern New York State.

At 10:30 a.m. EDT today ridge located on a line north-south over
western South Dakota.
By 10:30 a.m. EDT Monday ridge located from James Bay to Lake
Superior then to Kansas.

By 10:30 a.m. EDT Monday approaching trough located on a line
northeast-southwest over southern Manitoba.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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