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Water temperature in Naoshima in September

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Is it warm enough to swim in Naoshima in September? Average water temperature in Naoshima in September is 26.8°C and therefore suitable for comfortable swimming. The warmest sea in Naoshima in September is 30.3°C, and the coldest is 24.6°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Naoshima

Changes water temperature in Naoshima in September 2025, 2024

To get an accurate forecast for the water temperature in Naoshima for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Naoshima, 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:

Year 1:   Year 2:


Day 2025 2024 Min Max
1 September30.1°C27.8°C25.8°C30.1°C
2 September30.3°C27.8°C26.9°C30.3°C
3 September30.1°C27.9°C26.4°C30.1°C
4 September29.9°C27.6°C25.9°C29.9°C
5 September29.6°C27.7°C25.9°C29.6°C
6 September29.6°C28.1°C26.6°C29.6°C
7 September29.4°C28°C26.6°C29.4°C
8 September29.1°C28.3°C25.3°C29.1°C
9 September29.5°C28.3°C26.4°C29.5°C
10 September29.3°C28.4°C25.3°C29.3°C
11 September29.1°C28.5°C25.2°C29.1°C
12 September28.9°C28.6°C25.3°C28.9°C
13 September28.9°C28.9°C26.2°C28.9°C
14 September28.9°C28.5°C25.1°C28.9°C
15 September29.1°C28.6°C25.1°C29.1°C
Day 2025 2024 Min Max
16 September29.4°C28.9°C25.9°C29.4°C
17 September29.6°C28.8°C24.7°C29.6°C
18 September29.1°C28.8°C24.8°C29.1°C
19 September29°C29.4°C26.6°C29.4°C
20 September28.6°C29°C24.9°C29°C
21 September28.5°C28.7°C25.1°C28.7°C
22 September28.3°C28.5°C25.1°C28.5°C
23 September27.9°C28.6°C24.7°C28.6°C
24 September27.6°C28.5°C24.8°C28.5°C
25 September27.9°C27.9°C24.6°C27.9°C
26 September27.5°C28°C24.6°C28°C
27 September27.9°C28°C24.9°C28°C
28 September27.8°C27.6°C24.8°C27.8°C
29 September27.3°C27.4°C24.8°C27.5°C
30 September27.1°C27.8°C25°C27.8°C
Naoshima water temp chart in September

Average water temperature in Naoshima in September over a decade

20162017201820192020
26.2°C26.4°C26.6°C27°C26.8°C
20212022202320242025
26.1°C27.2°C28°C28.3°C28.8°C

Naoshima water temperature during other months:

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

Where is the warm sea water in September?

Want to know where the water temperature in September 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

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Our report for Naoshima 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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