Water temperature in Trevignon in September

Is it warm enough to swim in Trevignon in September? Average water temperature in Trevignon in September is 17.3°C and therefore is not suitable for comfortable swimming. The warmest sea in Trevignon in September is 19.7°C, and the coldest is 15.4°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Trevignon

Changes water temperature in Trevignon in September 2025, 2024

To get an accurate forecast for the water temperature in Trevignon for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Trevignon, 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	17.4°C	18.2°C	17.1°C	18.8°C
2 September	17°C	18.7°C	17°C	19°C
3 September	17.4°C	18.7°C	16.9°C	18.7°C
4 September	17.5°C	18.4°C	16.7°C	18.8°C
5 September		18.3°C	17.2°C	18.8°C
6 September		18.2°C	16.8°C	19.3°C
7 September		18.1°C	16.8°C	18.8°C
8 September		17.9°C	17.4°C	19.5°C
9 September		17.2°C	17°C	19.6°C
10 September		17.2°C	17°C	19.7°C
11 September		17.1°C	17°C	19.5°C
12 September		16.3°C	16°C	18.8°C
13 September		16.2°C	16.2°C	18.6°C
14 September		15.9°C	15.9°C	18.8°C
15 September		15.8°C	15.8°C	19.3°C

Day	2024	Min	Max
16 September	16°C	16°C	19°C
17 September	16.2°C	15.6°C	19.3°C
18 September	16.3°C	15.6°C	19.1°C
19 September	16.6°C	16.2°C	18.7°C
20 September	16.7°C	15.6°C	18.6°C
21 September	16.5°C	15.6°C	18.8°C
22 September	16.7°C	15.6°C	18.7°C
23 September	16.3°C	16.3°C	18.5°C
24 September	16.4°C	16°C	18.4°C
25 September	16.2°C	15.8°C	18.3°C
26 September	16°C	15.9°C	18.2°C
27 September	15.5°C	15.5°C	18.4°C
28 September	15.7°C	15.7°C	18.1°C
29 September	15.5°C	15.5°C	18.4°C
30 September	15.4°C	15.4°C	18.9°C

Average water temperature in Trevignon in September over a decade

2015	2016	2017	2018	2019
16.9°C	18°C	16.5°C	17°C	16.6°C

2020	2021	2022	2023	2024
18.3°C	18.3°C	17.7°C	18.5°C	16.8°C

Trevignon 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
Kerfany les Pins	17.3°C	15.4°C	19.5°C
Benodet	17.1°C	14.8°C	20°C
La Foret Fouesnant	17.1°C	14.8°C	20°C
Guidel Plage	17.2°C	15.2°C	19.2°C
Le Pouldu	17.3°C	15.1°C	19.3°C
Loctudy	17°C	14.7°C	19.5°C
Plobannalec Lesconil	17°C	14.6°C	19.4°C
Combrit	17°C	14.8°C	19.4°C
Lomener	17.3°C	15°C	19.4°C
Ploemeur	17.3°C	15°C	19.4°C

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Our report for Trevignon 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