Lake Ontario Water Temperature

(Today) Jun 2024

16.8°C / 62.3°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

23°C / 73°F
(broken clouds)
Partly cloudy
12 mph

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.