Marine Forecast
Issued 03:00 AM EDT 20 October 2025
Today Tonight and Tuesday.
Strong wind warning in effect.
Wind northwest 20 knots diminishing to west 15 early this
morning and to west 10 near noon. Wind backing to south 10 early this evening
then increasing to southwest 20 overnight. Wind southwest 20
Tuesday.
Showers Tuesday.
Winds
Issued 03:00 AM EDT 20 October 2025
Today Tonight and Tuesday.
Strong wind warning in effect.
Wind northwest 20 knots diminishing to west 15 early this
morning and to west 10 near noon. Wind backing to south 10 early this evening
then increasing to southwest 20 overnight. Wind southwest 20
Tuesday.
Waves
Issued 03:00 AM EDT 20 October 2025
Today Tonight and Tuesday.
Waves 0.5 to 1 metre subsiding to 0.5 or less this morning then
building to 0.5 to 1 Tuesday morning.
Weather & Visibility
Issued 03:00 AM EDT 20 October 2025
Today Tonight and Tuesday.
Showers Tuesday.
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings (In effect)
Lake St. Clair
Issued 03:00 AM EDT 20 October 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.
Technical Marine Synopsis
Issued 3:00 AM EDT 20 October 2025 Today Tonight and Tuesday At 3:00 a.m. EDT today trough located on a line north-south over
eastern Ontario.
By 3:00 a.m. EDT Tuesday low 1003 mb located over Maine.
At 3:00 a.m. EDT today ridge located on a line north-south over
Wisconsin.
By 3:00 a.m. EDT Tuesday ridge located over the Ontario - Quebec
border.
At 3:00 a.m. EDT today low 997 mb located over South Dakota.
By 3:00 a.m. EDT Tuesday low 997 mb located over western Lake
Superior.