Water temperature in Marennes in October
Is it warm enough to swim in Marennes in October? Average water temperature in Marennes in October is 16.9°C and therefore is not suitable for comfortable swimming. The warmest sea in Marennes in October is 21°C, and the coldest is 14.2°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Marennes
Changes water temperature in Marennes in October 2025, 2024
To get an accurate forecast for the water temperature in Marennes for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Marennes, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of October.
You can choose any other years:
| Day |
2025 |
2024 |
Min |
Max |
| 1 October | 18.3°C | 16.9°C | 16.7°C | 19.4°C |
| 2 October | 18.2°C | 16.8°C | 16.8°C | 21°C |
| 3 October | 18.1°C | 16.8°C | 16.3°C | 20.9°C |
| 4 October | 18.2°C | 16.8°C | 16.2°C | 20.5°C |
| 5 October | 18.1°C | 16.8°C | 16.2°C | 20.3°C |
| 6 October | 17.9°C | 17°C | 16.3°C | 20°C |
| 7 October | 18°C | 17°C | 16°C | 19.9°C |
| 8 October | 17.5°C | 17°C | 16.2°C | 19.7°C |
| 9 October | 17.5°C | 16.8°C | 16.3°C | 19.8°C |
| 10 October | 17.3°C | 16.7°C | 16.3°C | 19.8°C |
| 11 October | 16.8°C | 16.6°C | 16.6°C | 20.1°C |
| 12 October | 17°C | 16.8°C | 16.4°C | 20°C |
| 13 October | 16.9°C | 17.2°C | 16.4°C | 20.2°C |
| 14 October | 16.7°C | 17.1°C | 16.3°C | 19.7°C |
| 15 October | 16.3°C | 17.3°C | 16.3°C | 19.6°C |
| Day |
2025 |
2024 |
Min |
Max |
| 16 October | 16.1°C | 17.1°C | 15.8°C | 19.1°C |
| 17 October | 15.8°C | 17.1°C | 15.6°C | 18.8°C |
| 18 October | 16°C | 17.1°C | 15.6°C | 18.6°C |
| 19 October | 16°C | 17°C | 15.5°C | 18.5°C |
| 20 October | 16°C | 17.1°C | 15.2°C | 18.3°C |
| 21 October | 15.4°C | 16.9°C | 15.1°C | 18°C |
| 22 October | 16.3°C | 16.8°C | 14.8°C | 17.9°C |
| 23 October | 16°C | 16.5°C | 14.7°C | 17.9°C |
| 24 October | 16.1°C | 16.6°C | 14.5°C | 18°C |
| 25 October | 15.8°C | 16.4°C | 14.4°C | 17.8°C |
| 26 October | 15.8°C | 16.5°C | 14.9°C | 17.6°C |
| 27 October | 15.2°C | 16°C | 14.2°C | 17.4°C |
| 28 October | 15.1°C | 16.1°C | 14.3°C | 17.9°C |
| 29 October | 14.5°C | 16.1°C | 14.4°C | 17.5°C |
| 30 October | 14.7°C | 16°C | 14.2°C | 17.4°C |
| 31 October | 14.9°C | 16.3°C | 14.2°C | 17.4°C |
Average water temperature in Marennes in October over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| 16.8°C | 18°C | 16.1°C | 17.1°C | 16.2°C |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 16.6°C | 17.7°C | 18.9°C | 16.7°C | 16.8°C |
Marennes water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below