Lake St. Clair
Forecast
Marine Forecast
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Wind southwest 10 knots veering to west 10 Friday morning then becoming light Friday afternoon.
Scattered showers this evening with a risk of thunderstorms. Scattered showers Friday with a risk of thunderstorms.
Waves
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Waves 0.5 metres or less.
Extended Forecast
Issued 06:30 PM EDT 19 June 2025
Saturday
Wind light becoming south 15 knots in the
morning.
Sunday
Wind light.
Monday
Wind light.
Stay connected
Weather Conditions
Zoom-in to make a selection

Legend:


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 7:01 PM EDT 19 June 2025Navigators in or near this marine area should be on the lookout for adverse weather conditions and take necessary safety precautions. Watch for updated statements. 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 6:30 PM EDT 19 June 2025 Tonight and Friday At 6:30 p.m. EDT tonight low 998 mb located west of Ottawa.By 6:30 p.m. EDT Friday low 993 mb located over the Gulf of
St. Lawrence.
At 6:30 p.m. EDT tonight ridge located on a line northeast-southwest
over James Bay.
By 6:30 p.m. EDT Friday weakening ridge located on a line
north-south over James Bay.
By 6:30 p.m. EDT Friday approaching trough located on a line
northeast-southwest over Manitoba.
Great Lakes - Lake Huron Area
Another Region
- Date modified: