Lake Ontario Weather

Environment Canada

• Forecast for Today Tonight and Tuesday. – Lake Ontario
  Wind northeast 20 knots today tonight and Tuesday. Issued 10:30 AM EDT 21 September 2026
• Waves for Today Tonight and Tuesday. – Lake Ontario
  Waves 1 to 1.5 metres.Issued 10:30 AM EDT 21 September 2026
• STRONG WIND WARNING IN EFFECT, Lake Ontario
  Issued 10:30 AM EDT 21 September 2026
• Extended Forecast – Lake Ontario
  Wednesday: Wind east 20 knots.Thursday: Wind east 15 knots.Friday: Wind northeast 15 knots diminishing to light.Issued 03:00 AM EDT 21 September 2026

WindFinder – Cobourg