Lake St. Clair
Forecast
Marine Forecast
Issued 10:30 AM EDT 21 May 2025
Today Tonight and Thursday.
Strong wind warning in effect.
Wind east 15 knots diminishing to east 10 this afternoon then backing to north 10 this evening. Wind increasing to north 20 near noon Thursday.
Periods of rain. Fog patches forming this afternoon and dissipating near noon Thursday.
Waves
Issued 10:30 AM EDT 21 May 2025
Today Tonight and Thursday.
Waves 1 metre subsiding to 0.5 near noon then building to 1
Thursday afternoon.
Extended Forecast
Issued 03:00 AM EDT 21 May 2025
Friday
Wind northwest 15 knots diminishing to light in
the afternoon.
Saturday
Wind light.
Sunday
Wind light becoming northeast 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
Warnings (In effect)
Strong wind warning in effect
Lake St. Clair
Issued 10:30 AM EDT 21 May 2025'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 or Weatheradio stations.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EDT 21 May 2025 Today Tonight and Thursday At 10:30 a.m. EDT today ridge located on a line north-south overnorthern Ontario.
By 10:30 a.m. EDT Thursday ridge located on a line north-south
over northwestern Ontario.
At 10:30 a.m. EDT today low 1002 mb located over Ohio.
By 10:30 a.m. EDT Thursday low 1001 mb located over southwestern
Ontario.
Great Lakes - Lake Huron Area
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