Western Lake Ontario
Forecast
Marine Forecast
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Strong wind warning in effect.
Wind west 20 knots diminishing to west 15 near midnight and to southwest 10 early Friday morning. Wind becoming light Friday evening.
Scattered showers this evening. Scattered showers Friday afternoon and evening with a risk of thunderstorms.
Waves
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Waves 1 to 1.5 metres subsiding to 0.5 to 1 late overnight and to
0.5 or less Friday morning.
Extended Forecast
Issued 06:30 PM EDT 19 June 2025
Saturday
Wind light becoming southwest 15 knots late
in the day.
Sunday
Wind southwest 20 knots.
Monday
Wind southwest 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
Western Lake Ontario
Issued 6:30 PM EDT 19 June 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 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
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