Eastern Lake Ontario
Forecast
Marine Forecast
Issued 03:00 AM EDT 20 June 2025
Today Tonight and Saturday.
Strong wind warning in effect.
Wind west 20 knots diminishing to west 15 this morning and to southwest 10 early this evening. Wind becoming light late this evening then becoming south 15 Saturday evening.
Scattered showers ending early this morning. Scattered showers overnight and Saturday with a risk of thunderstorms.
Waves
Issued 03:00 AM EDT 20 June 2025
Today Tonight and Saturday.
Waves 2 metres subsiding to 1 to 1.5 early this morning and to
0.5 to 1 near noon. Waves subsiding to 0.5 or less this evening then building to
0.5 to 1 Saturday evening.
Extended Forecast
Issued 03:00 AM EDT 20 June 2025
Sunday
Wind southwest 15 knots.
Monday
Wind southwest 15 knots.
Tuesday
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 03:00 AM EDT 20 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 3:00 AM EDT 20 June 2025 Today Tonight and Saturday At 3:00 a.m. EDT today departing low 997 mb located near Montréal.At 3:00 a.m. EDT today ridge located on a line northeast-southwest
over northeastern Ontario.
By 3:00 a.m. EDT Saturday weakening ridge located on a line
north-south over western Quebec.
By 3:00 a.m. EDT Saturday approaching low 995 mb located over
western Minnesota.
Great Lakes - Lake Huron Area
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