Water temperature in Seatoun in September
Is it warm enough to swim in Seatoun in September? Average water temperature in Seatoun in September is 12.6°C and therefore is not suitable for comfortable swimming. The warmest sea in Seatoun in September is 14.2°C, and the coldest is 11°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Seatoun
Changes water temperature in Seatoun in September 2025, 2024
To get an accurate forecast for the water temperature in Seatoun for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Seatoun, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.
You can choose any other years:
Day |
2025 |
2024 |
Min |
Max |
1 September | 12°C | 13°C | 11.7°C | 13.1°C |
2 September | 12.2°C | 13.3°C | 11.5°C | 13.3°C |
3 September | 12.3°C | 13.3°C | 11.6°C | 13.9°C |
4 September | 12.6°C | 13.1°C | 11.8°C | 13.3°C |
5 September | | 12.9°C | 11.7°C | 12.9°C |
6 September | | 12.7°C | 11.8°C | 12.8°C |
7 September | | 13°C | 11.5°C | 13°C |
8 September | | 13°C | 11.8°C | 13°C |
9 September | | 13.3°C | 11.8°C | 13.3°C |
10 September | | 13.1°C | 11.3°C | 13.1°C |
11 September | | 13.1°C | 11.9°C | 13.1°C |
12 September | | 13.2°C | 11.2°C | 13.8°C |
13 September | | 13.2°C | 12°C | 13.2°C |
14 September | | 13.3°C | 11.3°C | 13.8°C |
15 September | | 13.4°C | 12.3°C | 13.4°C |
Day |
2025 |
2024 |
Min |
Max |
16 September | | 13.5°C | 11.8°C | 13.5°C |
17 September | | 13.1°C | 11.6°C | 13.1°C |
18 September | | 12.6°C | 11.9°C | 14°C |
19 September | | 12.8°C | 11.9°C | 13.2°C |
20 September | | 12.7°C | 12.5°C | 13.4°C |
21 September | | 12.8°C | 12.2°C | 13.4°C |
22 September | | 12.7°C | 12.7°C | 13.4°C |
23 September | | 12.9°C | 12.2°C | 13.4°C |
24 September | | 12.9°C | 12°C | 13.6°C |
25 September | | 13°C | 11.7°C | 13.2°C |
26 September | | 13°C | 12.3°C | 13.2°C |
27 September | | 13.2°C | 12.2°C | 13.6°C |
28 September | | 13°C | 12°C | 13.7°C |
29 September | | 12.6°C | 11.8°C | 13.7°C |
30 September | | 12.7°C | 11.9°C | 13.9°C |
Average water temperature in Seatoun in September over a decade
2015 | 2016 | 2017 | 2018 | 2019 |
12.2°C | 12.5°C | 13°C | 12.1°C | 11.9°C |
2020 | 2021 | 2022 | 2023 | 2024 |
12.8°C | 12.6°C | 12.7°C | 12.7°C | 13°C |
Seatoun water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below