Eastern Lake Ontario
Forecast
Marine Forecast
Issued 03:00 AM EDT 16 July 2025
Today Tonight and Thursday.
Strong wind warning in effect.
Wind light becoming south 10 knots near noon then increasing to southwest 20 near noon Thursday. Wind veering to northwest 20 Thursday evening.
Scattered showers tonight and Thursday with a risk of thunderstorms.
Waves
Issued 03:00 AM EDT 16 July 2025
Today Tonight and Thursday.
Waves 0.5 metres or less building to 0.5 to 1 this evening and to
1.5 Thursday afternoon.
Extended Forecast
Issued 03:00 AM EDT 16 July 2025
Friday
Wind north 15 knots diminishing to light in the
morning.
Saturday
Wind light.
Sunday
Wind west 15 knots diminishing to light late in
the day.
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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 16 July 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 16 July 2025 Today Tonight and Thursday At 3:00 a.m. EDT today trough located on a line northeast-southwestover Whitefish Bay.
By 3:00 a.m. EDT Thursday trough located on a line
northeast-southwest over Georgian Bay.
At 3:00 a.m. EDT today low 1010 mb located over Iowa.
By 3:00 a.m. EDT Thursday low 1006 mb located over Lower Michigan.
At 3:00 a.m. EDT today high 1025 mb located over southeastern
Alberta.
By 3:00 a.m. EDT Thursday high 1020 mb located over North Dakota.
Great Lakes - Lake Erie and Lake Ontario Area
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