Eastern Lake Ontario
Forecast
Marine Forecast
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Strong wind warning in effect.
Wind southwest 25 knots veering to west 20 this evening then diminishing to west 15 late overnight. Wind backing to southwest 15 near noon Friday then diminishing to southwest 10 Friday evening.
Scattered showers ending overnight. Risk of thunderstorms early this evening.
Waves
Issued 06:30 PM EDT 19 June 2025
Tonight and Friday.
Waves 1 to 1.5 metres subsiding to 0.5 to 1 early Friday morning
and to 0.5 or less Friday evening.
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
Eastern 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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