Lake Ontario Water Temperature
(Today) May 2024
5.3°C / 41.5°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
11°C / 52°F
(few clouds)
(few clouds)
Wind
14 mph
Humidity
91%
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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.