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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 16 March 2026

Today Tonight and Tuesday.

Wind south 30 knots veering to southwest 30 early this morning then diminishing to west 20 early this evening. Wind veering to northwest 15 Tuesday morning then backing to west 15 Tuesday afternoon.

Rain ending late this morning with a risk of thunderstorms. Scattered flurries this afternoon tonight and Tuesday. Visibility as low as 1 mile in flurries.

Waves

Issued 03:00 AM EDT 16 March 2026
Today Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon Tuesday.

Extended Forecast

Issued 03:00 AM EDT 16 March 2026
Wednesday Wind light becoming southwest 15 knots in the morning.
Thursday Wind southwest 15 knots diminishing to light late in the day.
Friday Wind light becoming south 15 knots late in the day.

Ice Forecast*

Issued 12:00 PM EDT 15 March 2026 Today Tonight and Monday Open water.

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

 

[ Canadian Ice Service ]

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

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

Ice Forecasts

Issued 12:00 PM EDT 15 March 2026 Today Tonight and Monday

Ice Coverage

Open water.

Warnings

Watches (In effect)

Squall watch in effect

Lake St. Clair

Issued 04:35 AM EDT 16 March 2026 Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times.

Squalls associated with gusty southerly winds or thunderstorms approaching from the southwest will move over region this morning.

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.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 16 March 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today low 988 mb located over southern Michigan.
By 3:00 a.m. EDT Tuesday low 979 mb located over eastern Quebec.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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