Water temperature in Tresaith in September

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Is it warm enough to swim in Tresaith in September? Average water temperature in Tresaith in September is 16.4°C and therefore is not suitable for comfortable swimming. The warmest sea in Tresaith in September is 18.5°C, and the coldest is 14.9°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Tresaith

Changes water temperature in Tresaith in September 2025, 2024

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

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	18°C	17°C	16.3°C	18.2°C
2 September	17.9°C	16.9°C	16.2°C	18°C
3 September	18°C	16.9°C	16°C	18°C
4 September	18°C	17°C	15.9°C	18°C
5 September	17.8°C	17°C	15.9°C	18.2°C
6 September		17°C	16.4°C	18.1°C
7 September		16.9°C	16°C	18.2°C
8 September		16.8°C	16.2°C	18.1°C
9 September		16.7°C	16.4°C	18.5°C
10 September		16.9°C	15.9°C	18.4°C
11 September		16.7°C	15.9°C	18.2°C
12 September		16.5°C	15.8°C	18.3°C
13 September		16.4°C	15.8°C	18.1°C
14 September		16.3°C	15.5°C	17.9°C
15 September		16.3°C	15.4°C	18.2°C

Day	2024	Min	Max
16 September	16.1°C	15.6°C	18°C
17 September	16.3°C	15.2°C	17.7°C
18 September	16.3°C	15.4°C	17.6°C
19 September	16.2°C	15.5°C	17.3°C
20 September	16.1°C	15.4°C	17.3°C
21 September	16.1°C	15.4°C	17.2°C
22 September	16.1°C	15.4°C	17°C
23 September	16°C	15.1°C	16.9°C
24 September	16°C	15.1°C	17.1°C
25 September	16°C	15.1°C	17.1°C
26 September	15.9°C	15.3°C	16.9°C
27 September	15.8°C	15.1°C	16.9°C
28 September	15.7°C	15°C	16.7°C
29 September	15.6°C	14.9°C	16.4°C
30 September	15.5°C	14.9°C	16.4°C

Average water temperature in Tresaith in September over a decade

2015	2016	2017	2018	2019
15.5°C	16.7°C	16.1°C	16.4°C	16.7°C

2020	2021	2022	2023	2024
16.2°C	17°C	17.5°C	17.5°C	16.4°C

Tresaith 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
Penbryn	16.4°C	14.9°C	18.5°C
Cwm-yr-Eglwys	15.9°C	14.7°C	17.8°C
Fishguard	15.8°C	14.6°C	17.5°C
Goodwick	15.8°C	14.6°C	17.5°C
Llansteffan	16.9°C	15.1°C	19.6°C
Porthgain	15.6°C	14.4°C	17.3°C
Pendine	16.9°C	15.2°C	19.6°C
Amroth	16.8°C	15.2°C	19.5°C
Aberdyfi	16.5°C	14.4°C	19.4°C
Saundersfoot	16.8°C	15.2°C	19.3°C

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Our report for Tresaith 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