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Water temperature in Perth (WA) in August

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Is it warm enough to swim in Perth in August? Average water temperature in Perth in August is 17.7°C and therefore is not suitable for comfortable swimming. The warmest sea in Perth in August is 19.5°C, and the coldest is 16.2°C. Average high air temperature in Perth in August is 19°C, and average low temperature is 8°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Perth

Changes water temperature in Perth in August 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
1 August16.3°C17.4°C16.3°C19.2°C
2 August16.7°C17.4°C16.7°C19°C
3 August16.8°C17.1°C16.3°C19.1°C
4 August16.6°C17.3°C16.6°C19.1°C
5 August16.5°C17.6°C16.5°C19.1°C
6 August16.4°C17.7°C16.2°C19.1°C
7 August16.3°C17.6°C16.3°C19.2°C
8 August16.2°C17.5°C16.2°C19.4°C
9 August16.8°C17.7°C16.8°C19.4°C
10 August16.7°C18.1°C16.6°C19.2°C
11 August17°C18.2°C16.8°C19.1°C
12 August17.2°C18.1°C17°C19°C
13 August17.3°C17.8°C16.9°C19.2°C
14 August17.2°C17.6°C16.8°C19.2°C
15 August16.7°C17.8°C16.7°C19.1°C
Day 2025 2024 Min Max
16 August16.8°C17.4°C16.8°C19.3°C
17 August17.1°C17.3°C17°C19.5°C
18 August17.3°C17.6°C17.1°C19.2°C
19 August17.4°C17.5°C16.8°C19.2°C
20 August17.3°C17.7°C17°C19.3°C
21 August17.3°C17.7°C16.9°C19.3°C
22 August16.8°C17.2°C16.8°C19.2°C
23 August17.1°C17.5°C16.7°C19.3°C
24 August17.2°C17.3°C16.7°C18.7°C
25 August17.3°C17.2°C16.7°C18.7°C
26 August17.3°C17.4°C16.4°C18.7°C
27 August17°C17.4°C16.6°C18.5°C
28 August16°C17.4°C16°C18.7°C
29 August15.9°C17.5°C15.9°C18.8°C
30 August16.1°C17.4°C16.1°C18.7°C
31 August16.1°C17.3°C16.1°C18.8°C
Perth water temp chart in August

Average water temperature in Perth in August over a decade

20162017201820192020
17.1°C17.8°C16.9°C17.4°C17.8°C
20212022202320242025
17.7°C17.5°C17.3°C17.5°C16.5°C

Perth sea state in August

Chart comparing the height of waves in Perth in August 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 Perth in August

Weather and climate in Perth in August

This data display average monthly climate indicators in Perth in August 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 temperature19°C
  • Average LOW temperature8°C
  • Average humidity
    54
  • Average rainfall days16 days
  • Average rainfall4.8''/122mm
  • Average daylight11h
  • Average sunshine7.1h
  • Average UV index4

Perth 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 August?

Want to know where the water temperature in August 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 August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Fremantle17.7°C16.2°C19.5°C
North Fremantle17.6°C16°C19.4°C
Coogee17.7°C16°C19.4°C
Leighton Beach17.8°C16.1°C19.5°C
Cottesloe17.6°C16.1°C19.4°C
Mosman Park17.6°C16.1°C19.4°C
Peppermint Grove17.6°C16.1°C19.4°C
Attadale17.6°C16.1°C19.4°C
Dalkeith17.6°C16.1°C19.4°C
Swanbourne17.8°C16.3°C19.5°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 Perth 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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