Eastern Lake Ontario
Forecast
Marine Forecast
Issued 10:30 AM EDT 12 July 2025
Today Tonight and Sunday.
Wind southeast 10 knots backing to east 10 this afternoon then veering to southeast 10 this evening. Wind increasing to south 15 near midnight then veering to west 15 Sunday morning. Wind diminishing to southwest 10 Sunday afternoon.
Scattered showers overnight and Sunday with a risk of thunderstorms.
Waves
Issued 10:30 AM EDT 12 July 2025
Today Tonight and Sunday.
Waves 0.5 metres or less building to 0.5 to 1 late overnight then
subsiding to 0.5 or less Sunday evening.
Extended Forecast
Issued 03:00 AM EDT 12 July 2025
Monday
Wind light becoming southwest 15 knots late in
the day.
Tuesday
Wind southwest 15 knots diminishing to
light.
Wednesday
Wind 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 12 July 2025 Today Tonight and Sunday At 10:30 a.m. EDT today trough located on a line north-south overLake Superior.
By 10:30 a.m. EDT Sunday trough located on a line north-south over
eastern Ontario.
At 10:30 a.m. EDT today ridge located on a line north-south over
South Dakota.
By 10:30 a.m. EDT Sunday ridge located on a line north-south
over Illinois.
Great Lakes - Lake Huron Area
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