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Ontario water temperature in October

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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

 
2024
2023
2022
2021
2020
14.3°C
11.8°C
11.8°C
15.2°C
12.4°C
15.7°C
15.7°C
12.3°C
16.4°C
13°C
15.8°C
15.6°C
15°C
15.8°C
14.4°C
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 is the warm sea water in October?

Want to know where the water temperature in October is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

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

AvrMinMax
Chatham-Kent17°C13.1°C21.1°C
Erieau17°C13°C21.1°C
Rondeau16.9°C12.9°C21.1°C
Wheatley16.8°C12.4°C21.3°C
Port Bruce16.8°C12.8°C21.1°C

Ontario photo gallery

  • Cherry Beach
  • Ontario
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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.

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