Lake St. Clair
Forecast
Marine Forecast
Issued 10:30 AM EDT 19 July 2025
Today Tonight and Sunday.
Wind light becoming south 10 knots near noon then increasing to west 15 early this evening. Wind diminishing to west 10 near midnight then veering to north 10 Sunday morning. Wind veering to northeast 10 Sunday evening.
Showers tonight with a risk of thunderstorms.
Waves
Issued 10:30 AM EDT 19 July 2025
Today Tonight and Sunday.
Waves 0.5 metres or less.
Extended Forecast
Issued 03:36 AM EDT 19 July 2025
Monday
Wind light.
Tuesday
Wind light.
Wednesday
Wind light becoming south 15 knots.
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Weather Conditions
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Ice Conditions
*Ice Forecast and Warnings also apply to U.S. waters
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.Warnings
Watches (In effect)
Squall watch in effect
Lake St. Clair
Issued 4:59 PM EDT 19 July 2025 Conditions are favourable for the development of squalls with wind gusts up to 40 knots and frequent lightning.Thunderstorms over Michigan are expected to track over the area this evening. Thunderstorms are expected to be weakening when they arrive.
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 6:30 PM EDT 19 July 2025 Tonight and Sunday At 6:30 p.m. EDT tonight trough located on a linenortheast-southwest over Lower Michigan.
By 6:30 p.m. EDT Sunday departing trough located over the East
Coast of the U.S.
At 6:30 p.m. EDT tonight high 1017 mb located over Lake Winnipeg.
By 6:30 p.m. EDT Sunday building high 1019 mb located over Lake
Superior.
Great Lakes - Lake Erie and Lake Ontario Area
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