Water temperature in Seatoun in September

Is it warm enough to swim in Seatoun in September? Average water temperature in Seatoun in September is 12.6°C and therefore is not suitable for comfortable swimming. The warmest sea in Seatoun in September is 14.2°C, and the coldest is 11°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Seatoun

Changes water temperature in Seatoun in September 2025, 2024

To get an accurate forecast for the water temperature in Seatoun for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Seatoun, 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	12°C	13°C	11.7°C	13.1°C
2 September	12.2°C	13.3°C	11.5°C	13.3°C
3 September	12.3°C	13.3°C	11.6°C	13.9°C
4 September	12.6°C	13.1°C	11.8°C	13.3°C
5 September	12.4°C	12.9°C	11.7°C	13.1°C
6 September	12.5°C	12.7°C	11.6°C	12.8°C
7 September	12.6°C	13°C	11.5°C	13°C
8 September	12.3°C	13°C	11°C	13.3°C
9 September	12.3°C	13.3°C	11.2°C	13.3°C
10 September	12.4°C	13.1°C	11.3°C	13.1°C
11 September	12.2°C	13.1°C	11.2°C	13.2°C
12 September	12.4°C	13.2°C	11.2°C	13.8°C
13 September	12.1°C	13.2°C	11.3°C	14.2°C
14 September	12.3°C	13.3°C	11.3°C	13.8°C
15 September	12.7°C	13.4°C	11.5°C	13.4°C

Day	2025	2024	Min	Max
16 September	12.8°C	13.5°C	11.8°C	13.5°C
17 September	12.8°C	13.1°C	11.6°C	13.4°C
18 September	13.1°C	12.6°C	11.9°C	14°C
19 September	12.8°C	12.8°C	11.9°C	13.2°C
20 September	12.8°C	12.7°C	12°C	13.4°C
21 September	12.7°C	12.8°C	12.1°C	13.4°C
22 September	12.9°C	12.7°C	12.2°C	13.4°C
23 September	13.1°C	12.9°C	12.2°C	13.4°C
24 September	13.5°C	12.9°C	12°C	13.6°C
25 September	13.4°C	13°C	11.7°C	13.4°C
26 September		13°C	12.3°C	13.2°C
27 September		13.2°C	12.2°C	13.6°C
28 September		13°C	12°C	13.7°C
29 September		12.6°C	11.8°C	13.7°C
30 September		12.7°C	11.9°C	13.9°C

Average water temperature in Seatoun in September over a decade

2015	2016	2017	2018	2019
12.2°C	12.5°C	13°C	12.1°C	11.9°C

2020	2021	2022	2023	2024
12.8°C	12.6°C	12.7°C	12.7°C	13°C

Seatoun 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
Titahi Bay	12.9°C	11.4°C	14.2°C
Plimmerton	12.9°C	11.4°C	14.2°C
Paekakariki	12.9°C	11.6°C	14.4°C
Raumati Beach	13°C	11.7°C	14.4°C
Paraparaumu	13°C	11.7°C	14.5°C
Kapiti Island	13°C	11.7°C	14.6°C
Waikanae	13°C	11.8°C	14.6°C
Marlborough Sounds	12.3°C	10.9°C	13.6°C
Picton	12.2°C	10.9°C	13.6°C
Otaki Beach	13°C	11.7°C	14.7°C

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Our report for Seatoun 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