Water temperature in Aoshima in September

Is it warm enough to swim in Aoshima in September? Average water temperature in Aoshima in September is 27.3°C and therefore suitable for comfortable swimming. The warmest sea in Aoshima in September is 29.5°C, and the coldest is 24.3°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Aoshima

Changes water temperature in Aoshima in September 2025, 2024

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

Sea state

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	27.8°C	27.2°C	26.7°C	28.6°C
2 September	28.9°C	27.4°C	27.3°C	28.9°C
3 September	28.9°C	27.9°C	27°C	28.9°C
4 September	29°C	27.9°C	26.7°C	29°C
5 September	28°C	27.9°C	26.5°C	28.3°C
6 September	27.7°C	28°C	27.1°C	28.6°C
7 September	27.9°C	28.2°C	27.1°C	28.3°C
8 September	27.8°C	28.2°C	26.3°C	28.2°C
9 September	27.9°C	28.2°C	26.7°C	28.3°C
10 September	27.9°C	28.6°C	26.5°C	28.6°C
11 September	27.8°C	28.9°C	26.6°C	28.9°C
12 September	27.8°C	28.9°C	26.5°C	28.9°C
13 September	27.7°C	28.7°C	27°C	28.7°C
14 September	26.7°C	28.6°C	26.5°C	28.6°C
15 September	27.5°C	28.9°C	26.4°C	28.9°C

Day	2025	2024	Min	Max
16 September	27.4°C	29°C	26.4°C	29°C
17 September	28.1°C	29.5°C	26.3°C	29.5°C
18 September	27°C	29.2°C	26.5°C	29.2°C
19 September	27.2°C	29.3°C	26.8°C	29.3°C
20 September	27.5°C	28.8°C	26.6°C	28.8°C
21 September	27.5°C	28.8°C	26.5°C	28.8°C
22 September	27.5°C	28.6°C	26.6°C	28.6°C
23 September	27.5°C	28.4°C	25.7°C	28.4°C
24 September	27.4°C	28.1°C	25.6°C	28.1°C
25 September	27.4°C	27.9°C	25.2°C	27.9°C
26 September	27.6°C	27.6°C	25°C	27.6°C
27 September	27.5°C	27.5°C	24.4°C	27.5°C
28 September	27.3°C	27.4°C	24.5°C	27.5°C
29 September	27.3°C	27.3°C	24.6°C	27.5°C
30 September	27.2°C	27.3°C	24.3°C	27.3°C

Average water temperature in Aoshima in September over a decade

2016	2017	2018	2019	2020
27.2°C	27.6°C	27°C	27.2°C	27°C

2021	2022	2023	2024	2025
26.8°C	27.4°C	27.8°C	28.3°C	27.7°C

Aoshima water temperature during other months:

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

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Our report for Aoshima 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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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature