All data are in degrees Fahrenheit

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Water temperature in Perth

Detailed information about the current water temperature in Perth. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Perth now

61.5

°F

August 29, 22:51

Trend:

decreasing

Yesterday:

62.6°F

Tomorrow:

61.5°F

Sunrise:

06:38

Sunset:

17:58

Day Length:

11 h. 20 min.

Perth in September

Minimum:

71.5°F

Average:

73.8°F

Maximum:

75.7°F

Sea water temperature in Perth today

As of now, in Perth, the water temperature is 61.5°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.3°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 63.9°F on 2023, while the historical minimum was 61.4°F on 2016.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 61.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Perth

Date Current Year

actual* / forecast**

last year 10 years average
Aug 15 62.5°F 63.2°F 63.2°F
Aug 16 62.4°F 63.7°F 63.3°F
Aug 17 62.5°F 63.0°F 63.3°F
Aug 18 62.5°F 63.0°F 63.2°F
Aug 19 62.4°F 63.0°F 63.1°F
Aug 20 62.5°F 63.1°F 62.9°F
Aug 21 62.7°F 63.3°F 63.1°F
Aug 22 62.7°F 63.3°F 63.0°F
Aug 23 62.3°F 63.0°F 62.8°F
Aug 24 62.4°F 63.2°F 62.7°F
Aug 25 62.5°F 63.2°F 62.7°F
Aug 26 62.7°F 63.0°F 62.8°F
Aug 27 62.8°F 63.0°F 62.8°F
Aug 28 62.6°F 63.1°F 62.7°F
Aug 29 61.5°F 63.4°F 62.8°F
Aug 30 61.5°F 63.4°F 62.8°F
Aug 31 61.4°F 63.3°F 62.7°F
Sep 1 61.4°F 63.0°F 62.7°F
Sep 2 61.4°F 62.5°F 62.7°F
Sep 3 61.3°F 62.2°F 62.6°F
Sep 4 61.3°F 62.7°F 62.6°F
Sep 5 61.2°F 63.0°F 62.5°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Perth by month

In Perth, the months January through March offer comfortable swimming conditions, which amounts to 81 swimming days.
The warmest water in Perth was recorded on February 8, 2025, reaching a 78.6°F. While the coldest temperature occurred on September 6, 2018, dipping to 60.8°F. The average readings by season are 73.4°F in Winter, 70.8°F in Spring, 64.8°F in Summer, and 65.7°F in Autumn.