Ontario water temperature in October

How cold is Ontario water in autumn? In October water temperature throughout Ontario is not yet warm enough for swimming and does not exceed 20°C. Based on average water temperature observations over the past ten years, the warmest water temperature in Ontario in October was 17°C (in Chatham-Kent), and the coldest 6.8°C (in Kashechewan). To find out the sea temperature today and in the coming days, go to Current sea temperature in Ontario

Ontario surface temperature in October

Ontario cities and resorts with the values of the average water temperature in October in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.

Ontario list of regions

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2020

Agawa Bay

14.3°C

11.8°C

15.2°C

12.4°C

Ajax

15.7°C

12.3°C

16.4°C

13°C

Allenwood Beach

15.8°C

15.6°C

15°C

15.8°C

14.4°C

Awenda Provincial Park

15.4°C

15.6°C

14.9°C

16°C

14.2°C

Ontario water temperature by month

To find out what the water temperature was in Ontario any day over a period of the last ten years, select the month

Where can you swim in Ontario in October?

Places with the warmest average water temperature in Ontario in October. Also indicated are the maximum and minimum temperatures in October for these locations based on observations over the past 10 years

	Avr	Min	Max
Erieau	17°C	13°C	21.1°C
Chatham-Kent	17°C	13.1°C	21.1°C
Rondeau	16.9°C	12.9°C	21.1°C
Port Bruce	16.8°C	12.8°C	21.1°C
Wheatley	16.8°C	12.4°C	21.3°C

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Our report for Canada is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.