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Lake St. Clair

Warnings

Forecast

Marine Forecast

Issued 06:30 PM EDT 17 June 2026

Tonight and Thursday.

Strong wind warning in effect.

Wind south 15 knots increasing to south 25 early this evening then veering to southwest 25 late overnight. Wind veering to west 25 early Thursday morning then to northwest 20 Thursday afternoon. Wind diminishing to northwest 15 Thursday evening.

Rain or thunderstorms changing to scattered showers overnight with a risk of thunderstorms.

Waves

Issued 06:30 PM EDT 17 June 2026
Tonight and Thursday. Waves 0.5 metres building to 1 this evening.

Extended Forecast

Issued 06:30 PM EDT 17 June 2026
Friday Wind west 15 knots diminishing to light late in the day.
Saturday Wind light becoming west 15 knots.
Sunday Wind light.

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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 17 May 2026 Forecasts have ended for the season.
Warnings

Warnings (In effect)

Squall warning in effect

Lake St. Clair

Issued 9:15 PM EDT 17 June 2026 Squalls with wind gusts up to 45 knots are expected or occurring in the area.

A line of showers is bringing some strong gusty winds to Western Lake Erie and Lake St. Clair this evening.

Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.

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

Strong wind warning in effect

Lake St. Clair

Issued 6:30 PM EDT 17 June 2026

'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.

Synopsis

Technical Marine Synopsis

Issued 6:30 PM EDT 17 June 2026 Tonight and Thursday At 6:30 p.m. EDT tonight low 990 mb located over southern Minnesota.
By 6:30 p.m. EDT Thursday low 991 mb located over southern Quebec.

By 6:30 p.m. EDT Thursday trough located on a line north-south
over western Lake Superior.

Great Lakes - Lake Erie and Lake Ontario Area

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Marine Weather for Canada

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