Western Lake Ontario
Forecast
Marine Forecast
Issued 06:30 PM EDT 12 June 2025
Tonight and Friday.
Wind northwest 10 knots veering to northeast 10 near midnight then increasing to northeast 15 early Friday morning.
Waves
Issued 06:30 PM EDT 12 June 2025
Tonight and Friday.
Waves 0.5 metres or less building to 0.5 to 1 Friday
morning.
Extended Forecast
Issued 06:30 PM EDT 12 June 2025
Saturday
Wind northeast 15 knots diminishing to light
late in the day.
Sunday
Wind light.
Monday
Wind light.
Stay connected
Weather Conditions
Zoom-in to make a selection

Legend:


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 6:30 PM EDT 12 June 2025 Tonight and Friday At 6:30 p.m. EDT tonight high 1027 mb located over northwesternOntario.
By 6:30 p.m. EDT Friday high 1025 mb located near James Bay.
At 6:30 p.m. EDT tonight quasi-stationary cold front located on
a line east-west over Ohio.
Great Lakes - Lake Erie and Lake Ontario Area
Another Region
- Date modified: