Eastern Lake Ontario
Forecast
Marine Forecast
Issued 10:30 AM EDT 13 July 2025
Today Tonight and Monday.
Wind southwest 15 knots diminishing to south 10 this evening then becoming light near midnight. Wind becoming southwest 10 Monday morning.
Scattered showers ending near midnight with a risk of thunderstorms.
Waves
Issued 10:30 AM EDT 13 July 2025
Today Tonight and Monday.
Waves 0.5 to 1 metre subsiding to 0.5 or less near
midnight.
Extended Forecast
Issued 03:00 AM EDT 13 July 2025
Tuesday
Wind light.
Wednesday
Wind light.
Thursday
Wind light becoming 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
Watches (In effect)
Squall watch in effect
Eastern Lake Ontario
Issued 1:02 PM EDT 13 July 2025 Conditions are favourable for the development of squalls with wind gusts up to 35 knots and frequent lightning.Thunderstorms with squalls possible this afternoon and evening. Storms will mainly be moving eastward.
Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EDT 13 July 2025 Today Tonight and Monday At 10:30 a.m. EDT today trough from 992 mb low located from JamesBay to Lake Erie.
By 10:30 a.m. EDT Monday departing trough from 985 mb low located
from Hudson Bay to the St. Lawrence River.
At 10:30 a.m. EDT today quasi-stationary ridge located on a line
northeast-southwest over West Virginia.
Great Lakes - Lake Erie and Lake Ontario Area
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