Lake Ontario Water Temperature
(Today) Oct 2024
15.5°C / 59.9°F
The water will feel medium. The water will feel a bit chilly in just bathers / swimming costume. If you plan on wearing a wetsuit 4/3mm should be thick enough.
Current weather
8°C / 47°F
(overcast clouds)
(overcast clouds)
Wind
26 mph
Humidity
68%
Water temps is based on average surface temperatures measured throughout Lake Ontario.
Map showing Lake Ontario locations. Click on pins to view water temperature.
16 locations listed in Lake Ontario.
Based on readings from St. Catharines