Eastern Lake Ontario
Forecast
Marine Forecast
Issued 10:30 AM EDT 09 July 2025
Today Tonight and Thursday.
Wind light becoming southwest 10 knots near noon Thursday.
Scattered showers this afternoon and tonight with a risk of thunderstorms. Scattered showers Thursday late in the day with a risk of thunderstorms.
Waves
Issued 10:30 AM EDT 09 July 2025
Today Tonight and Thursday.
Waves less than 0.5 metres building to 0.5 Thursday
afternoon.
Extended Forecast
Issued 03:00 AM EDT 09 July 2025
Friday
Wind light.
Saturday
Wind light becoming east 15 knots.
Sunday
Wind south 15 knots diminishing to
light.
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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
No watches or warnings in effect.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EDT 9 July 2025 Today Tonight and Thursday At 10:30 a.m. EDT today trough located on a line east-west oversouthwestern Ontario.
By 10:30 a.m. EDT Thursday departing trough located on a line
east-west over central Ohio.
At 10:30 a.m. EDT today ridge located from James Bay to Minnesota.
By 10:30 a.m. EDT Thursday ridge located on a line
northeast-southwest over Upper Michigan.
By 10:30 a.m. EDT Thursday approaching trough located on a line
north-south over central South Dakota.
Great Lakes - Lake Huron Area
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