Water temperature in Romanshorn in September

Is it warm enough to swim in Romanshorn in September? Average water temperature in Romanshorn in September is 19.5°C and therefore is not suitable for comfortable swimming. The warmest water in Romanshorn in September is 23.2°C, and the coldest is 16.3°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Romanshorn

Changes water temperature in Romanshorn in September 2025, 2024

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

Tides

Sunrise and Sunset

You can choose any other years:

Day	2025	2024	Min	Max
1 September	21.3°C	23.2°C	20.3°C	23.2°C
2 September	19.8°C	22.9°C	19°C	22.9°C
3 September	19.9°C	22.9°C	19.3°C	22.9°C
4 September	19.9°C	22.9°C	19.6°C	22.9°C
5 September	19.8°C	22.7°C	19.7°C	22.7°C
6 September		22.3°C	19.8°C	22.3°C
7 September		22.4°C	20°C	22.4°C
8 September		22.1°C	19.9°C	22.1°C
9 September		21.7°C	19.2°C	21.7°C
10 September		20.5°C	19°C	21.8°C
11 September		20.2°C	19.4°C	21.9°C
12 September		19.9°C	19.1°C	21.8°C
13 September		19.7°C	18.8°C	21.5°C
14 September		19.6°C	18.7°C	21.3°C
15 September		19.5°C	18.7°C	21°C

Day	2024	Min	Max
16 September	19.4°C	18.5°C	21.3°C
17 September	19.3°C	18.5°C	20.9°C
18 September	18.8°C	18.1°C	20.5°C
19 September	18.6°C	18.1°C	20.8°C
20 September	18.3°C	18.1°C	21.3°C
21 September	18.4°C	17.8°C	21.3°C
22 September	18.2°C	17.6°C	20.9°C
23 September	17.9°C	17.4°C	21°C
24 September	17.6°C	17.2°C	20.2°C
25 September	17.4°C	17°C	19.5°C
26 September	17.1°C	16.8°C	18.9°C
27 September	16.9°C	16.6°C	18.7°C
28 September	16.8°C	16.5°C	18.8°C
29 September	16.7°C	16.5°C	18.6°C
30 September	16.6°C	16.3°C	18.7°C

Romanshorn water temp chart in September

Average water temperature in Romanshorn in September over a decade

2015	2016	2017	2018	2019
19.2°C	20.3°C	19.1°C	20.5°C	19.3°C

2020	2021	2022	2023	2024
20.4°C	19.3°C	19°C	20.2°C	19.7°C

Romanshorn water temperature during other months:

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

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Arbon	19.5°C	16.3°C	23.2°C
Rorschach	19.5°C	16.3°C	23.2°C
Kreuzlingen	19.5°C	16.3°C	23.1°C
Immenstaad am Bodensee	19.5°C	16.3°C	23.1°C
Langenargen	19.5°C	16.4°C	23.3°C
Constance	19.6°C	16.3°C	23.1°C
Meersburg	19.6°C	16.3°C	23.1°C
Uhldingen-Muhlhofen	19.6°C	16.3°C	23.1°C
Hagnau am Bodensee	19.6°C	16.3°C	23.1°C
Mainau	19.6°C	16.3°C	23.1°C

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Our report for Romanshorn 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.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature