Water temperature in Toronto Islands (ON) in May
Is it warm enough to swim in Toronto Islands in May? Average water temperature in Toronto Islands in May is 7.1°C and therefore is not suitable for comfortable swimming. The warmest water in Toronto Islands in May is 16.6°C, and the coldest is 2.5°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 May 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 May.
You can choose any other years:
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| 1 May | 3.6°C | 6.1°C | 3.1°C | 6.1°C |
| 2 May | 4.7°C | 5.9°C | 3.1°C | 6.4°C |
| 3 May | 4.7°C | 6.1°C | 3°C | 6.4°C |
| 4 May | 4.8°C | 7.1°C | 3°C | 7.1°C |
| 5 May | 4.9°C | 7.1°C | 2.9°C | 7.1°C |
| 6 May | 5°C | 7.2°C | 3.1°C | 7.2°C |
| 7 May | 4.4°C | 6.7°C | 3.4°C | 8°C |
| 8 May | 4.8°C | 7.3°C | 3.3°C | 8.2°C |
| 9 May | 5°C | 6.9°C | 4.1°C | 10.1°C |
| 10 May | 5°C | 6.9°C | 3.7°C | 9.7°C |
| 11 May | 5°C | 7.7°C | 3.8°C | 9.1°C |
| 12 May | 5.5°C | 7.8°C | 3.5°C | 7.9°C |
| 13 May | 5.5°C | 8°C | 2.8°C | 8.8°C |
| 14 May | 5.9°C | 8.2°C | 3.3°C | 10.1°C |
| 15 May | 6.3°C | 8.1°C | 3.3°C | 10.5°C |
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| 16 May | 5.7°C | 9.1°C | 3.9°C | 9.7°C |
| 17 May | 5.1°C | 9.9°C | 2.5°C | 9.9°C |
| 18 May | 5.6°C | 9.8°C | 3.6°C | 10.2°C |
| 19 May | 6.5°C | 11.3°C | 4.4°C | 11.8°C |
| 20 May | 6.3°C | 12.2°C | 4.7°C | 12.7°C |
| 21 May | 6.3°C | 12.2°C | 4.2°C | 12.9°C |
| 22 May | 6.6°C | 13.5°C | 3.7°C | 13.5°C |
| 23 May | 6.9°C | 13.8°C | 4.5°C | 13.8°C |
| 24 May | 6.8°C | 14.5°C | 3.9°C | 14.9°C |
| 25 May | 6.5°C | 13.2°C | 4.8°C | 14.8°C |
| 26 May | 6.2°C | 13°C | 3.5°C | 14.8°C |
| 27 May | 6.9°C | 13°C | 4.1°C | 14.8°C |
| 28 May | 7.1°C | 12.7°C | 4.3°C | 15.7°C |
| 29 May | 7.3°C | 13°C | 4.8°C | 15.9°C |
| 30 May | 8.1°C | 13°C | 5.3°C | 16.6°C |
| 31 May | 8°C | 11.8°C | 5°C | 16.1°C |
Average water temperature in Toronto Islands in May over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| 8.6°C | 6.6°C | 6.9°C | 4.2°C | 6.2°C |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 7.9°C | 7.3°C | 8.2°C | 9.8°C | 5.8°C |
Toronto Islands sea state in May
Chart comparing the height of waves in Toronto Islands in May 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.
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
