Lake Ontario Water Temperature
(Today) Apr 2024
4.3°C / 39.7°F
The water will feel very cold. For the hardcore only! The water is now dangerously cold and most people will risk hypothermia if not equipped with a thick, 6/5mm wetsuit along with boots and a hood
Current weather
13°C / 55°F
(broken clouds)
(broken clouds)
Wind
17 mph
Humidity
79%
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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.