Water temperature in Kiama (NSW) in September

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Is it warm enough to swim in Kiama in September? Average water temperature in Kiama in September is 17.4°C and therefore is not suitable for comfortable swimming. The warmest sea in Kiama in September is 19.7°C, and the coldest is 15.3°C. Average high air temperature in Kiama in September is 20°C, and average low temperature is 11°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Kiama

Changes water temperature in Kiama in September 2025, 2024

To get an accurate forecast for the water temperature in Kiama for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Kiama, 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	18.8°C	17.7°C	15.6°C	18.8°C
2 September	18.7°C	17°C	15.4°C	18.7°C
3 September	19.5°C	16.8°C	15.4°C	19.5°C
4 September	18.4°C	16.8°C	15.5°C	18.4°C
5 September		17.4°C	15.5°C	18°C
6 September		17.8°C	15.6°C	18.1°C
7 September		17.8°C	15.3°C	18.1°C
8 September		17.6°C	15.5°C	18.4°C
9 September		17.6°C	15.5°C	18.2°C
10 September		17.9°C	15.3°C	18.2°C
11 September		18°C	15.5°C	18.6°C
12 September		18.2°C	15.6°C	19.3°C
13 September		17.4°C	15.7°C	19.4°C
14 September		18.3°C	16°C	19.4°C
15 September		17.9°C	16.2°C	19.2°C

Day	2024	Min	Max
16 September	18.3°C	15.7°C	19°C
17 September	18.5°C	15.7°C	19°C
18 September	18.4°C	15.4°C	18.9°C
19 September	18.3°C	15.8°C	19°C
20 September	18.6°C	15.8°C	19.2°C
21 September	18.6°C	15.9°C	18.9°C
22 September	18.1°C	16.1°C	18.5°C
23 September	18.5°C	16.2°C	18.6°C
24 September	18.6°C	16.4°C	19.2°C
25 September	18.5°C	16.4°C	19.4°C
26 September	18.2°C	15.8°C	18.8°C
27 September	18°C	16°C	19.2°C
28 September	18.4°C	16.1°C	19.7°C
29 September	18.5°C	16.2°C	19.5°C
30 September	18.5°C	16.1°C	19.4°C

Average water temperature in Kiama in September over a decade

2015	2016	2017	2018	2019
18.6°C	18°C	17.6°C	16°C	17.4°C

2020	2021	2022	2023	2024
16.6°C	17.2°C	17.5°C	18°C	18°C

Kiama sea state in September

Chart comparing the height of waves in Kiama in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Weather and climate in Kiama in September

This data display average monthly climate indicators in Kiama in September based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature20°C
Average LOW temperature11°C
Average humidity
56
Average rainfall days9 days
Average rainfall2.9''/74mm

Kiama 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
Shellharbour Village	17.3°C	15.3°C	19.6°C
Werri Beach	17.3°C	15.3°C	19.7°C
Lake Illawarra	17.3°C	15.2°C	19.5°C
Gerroa	17°C	15.2°C	19.2°C
Warilla	17.3°C	15.2°C	19.4°C
Lake Heights	17.4°C	15.2°C	19.5°C
Shoalhaven Heads	16.9°C	15.1°C	19.2°C
Coniston	17.4°C	15.2°C	19.5°C
Port Kembla	17.4°C	15.2°C	19.5°C
Wollongong	17.3°C	15.2°C	19.5°C

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Our report for Kiama 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