World sea water temperatures

Water temperature in Swanbourne (WA) in September

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Is it warm enough to swim in Swanbourne in September? Average water temperature in Swanbourne in September is 17.6°C and therefore is not suitable for comfortable swimming. The warmest sea in Swanbourne in September is 19.3°C, and the coldest is 15.9°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Swanbourne

Changes water temperature in Swanbourne in September 2025, 2024

To get an accurate forecast for the water temperature in Swanbourne for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Swanbourne, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
1 September16.5°C17°C16.5°C18.8°C
2 September17.1°C17.3°C16.3°C18.9°C
3 September17.3°C17.7°C16.3°C18.6°C
4 September17.5°C17.7°C16.5°C18.6°C
5 September17.4°C17.5°C16.3°C18.9°C
6 September17°C17.1°C16.5°C18.6°C
7 September17°C17.4°C16.6°C18.3°C
8 September16.5°C17.7°C16.5°C18.2°C
9 September16.1°C17.5°C16.1°C18.3°C
10 September16.1°C17.7°C16.1°C18.5°C
11 September16.7°C17.8°C16.7°C18.7°C
12 September16.9°C18°C15.9°C18.7°C
13 September17.1°C18.2°C16.4°C18.7°C
14 September17°C18.3°C16.8°C18.8°C
15 September17.3°C18.5°C16.7°C19°C
Day 2025 2024 Min Max
16 September17.3°C18.5°C16.4°C19.1°C
17 September17.2°C18.7°C16.6°C19°C
18 September17.5°C18.5°C16.3°C19.1°C
19 September17.2°C18.2°C16.4°C19.3°C
20 September17.3°C17.8°C16.7°C19.3°C
21 September17.4°C17.8°C16.6°C19°C
22 September18.2°C17.6°C16.7°C18.9°C
23 September17.9°C17.8°C16.7°C18.8°C
24 September18.4°C17.8°C16.7°C18.9°C
25 September18.7°C17.9°C16.5°C18.9°C
26 September 18.1°C16.6°C18.9°C
27 September 17.6°C16.4°C18.9°C
28 September 17.7°C16.4°C18.9°C
29 September 17.7°C16.5°C19°C
30 September 18°C16.5°C18.9°C
Swanbourne water temp chart in September

Average water temperature in Swanbourne in September over a decade

20152016201720182019
17.4°C16.7°C17.9°C16.9°C17.9°C
20202021202220232024
18°C17.3°C17.3°C18.2°C17.8°C

Swanbourne sea state in September

Chart comparing the height of waves in Swanbourne 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.

Waves height in Swanbourne in September

Swanbourne water temperature during other months:

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

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

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

AvrMinMax
Floreat Beach17.7°C16°C19.4°C
Leighton Beach17.6°C15.8°C19.2°C
City Beach17.7°C16°C19.4°C
Trigg Beach17.8°C16.2°C19.5°C
Coogee17.5°C15.7°C19.2°C
Sorrento17.9°C16.2°C19.6°C
Rockingham17.5°C15.6°C19.1°C
Mindarie18.1°C16.1°C19.8°C
Quinns Rocks18.1°C16.1°C19.8°C
Safety Bay17.4°C15.4°C19°C

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Swanbourne 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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