Water temperature in Toronto Islands (ON) in September

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Is it warm enough to swim in Toronto Islands in September? Average water temperature in Toronto Islands in September is 19.7°C and therefore is not suitable for comfortable swimming. The warmest water in Toronto Islands in September is 23.3°C, and the coldest is 14.6°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Toronto Islands

Changes water temperature in Toronto Islands in September 2025, 2024

To get an accurate forecast for the water temperature in Toronto Islands for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Toronto Islands, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	21.1°C	22.1°C	18.6°C	22.8°C
2 September	21.3°C	21.7°C	18.6°C	22.7°C
3 September	21.1°C	21°C	18.7°C	22.5°C
4 September	20.8°C	20.6°C	18.7°C	22.5°C
5 September	19.8°C	21.1°C	18.8°C	23°C
6 September	19.7°C	20.7°C	18.7°C	23.3°C
7 September	19.4°C	20.3°C	18.7°C	23°C
8 September	16.6°C	20.1°C	16.6°C	22.9°C
9 September	15.4°C	19.3°C	15.4°C	23.1°C
10 September	15.4°C	18.1°C	15.4°C	23.2°C
11 September		18.9°C	17.7°C	22.1°C
12 September		19.5°C	17.1°C	21.8°C
13 September		18.9°C	16.6°C	21.7°C
14 September		19.3°C	16.9°C	21.2°C
15 September		19.3°C	16.2°C	21.8°C

Day	2024	Min	Max
16 September	20.2°C	15.6°C	22.2°C
17 September	20.2°C	15.8°C	22.3°C
18 September	19.9°C	16°C	22.7°C
19 September	20.7°C	16.6°C	21.9°C
20 September	20.7°C	16.6°C	21.9°C
21 September	21.2°C	16.3°C	21.9°C
22 September	21°C	15.4°C	21.4°C
23 September	20.6°C	15.4°C	21.3°C
24 September	20.3°C	15.6°C	21.8°C
25 September	20.6°C	15.3°C	21.9°C
26 September	20.4°C	14.7°C	22.5°C
27 September	19.9°C	14.6°C	22.8°C
28 September	19.6°C	14.7°C	21.3°C
29 September	20.9°C	15°C	20.9°C
30 September	19.3°C	15°C	19.3°C

Toronto Islands water temp chart in September

Average water temperature in Toronto Islands in September over a decade

2015	2016	2017	2018	2019
20°C	21°C	19.8°C	21.3°C	19.1°C

2020	2021	2022	2023	2024
18.4°C	20.6°C	20.2°C	20°C	20.2°C

Toronto Islands sea state in September

Chart comparing the height of waves in Toronto Islands in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Toronto Islands in September

Toronto Islands water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Centre Island Beach	19.7°C	14.6°C	23.3°C
Hanlan's Point	19.6°C	14.8°C	23.2°C
Sunnyside Beach	19.5°C	14.6°C	23.1°C
Humber Bay	19.5°C	14.6°C	23.1°C
Kew Beach	19.7°C	15.2°C	23.6°C
Kew Balmy Beach	19.7°C	15.2°C	23.6°C
Scarborough Bluffs	19.7°C	15.4°C	23.7°C
Bluffer's Park Beach	19.7°C	15.4°C	23.7°C
Port Credit	19.5°C	13.5°C	23.1°C
Rouge Beach	19.6°C	14.7°C	23.7°C

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Our report for Toronto Islands 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.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature