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

74.7

°F

April 3, 18:06

Trend:

stable

Yesterday:

75.1°F

Tomorrow:

74.7°F

Sunrise:

06:29

Sunset:

18:11

Day Length:

11 h. 42 min.

Perth in April

Minimum:

71.0°F

Average:

73.3°F

Maximum:

75.3°F

Sea water temperature in Perth today

As of now, in Perth, the water temperature is 74.7°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 3.0°F higher 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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 74.1°F on 2021, while the historical minimum was 69.9°F on 2017.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 74.4°F, the minimum temperature may reach 74.0°F, and the maximum might stay at 74.7°F.

Daily water temperature in Perth

Date Current Year

actual* / forecast**

last year 10 years average
Mar 20 73.2°F 73.7°F 73.6°F
Mar 21 72.9°F 73.5°F 73.5°F
Mar 22 72.6°F 72.6°F 73.3°F
Mar 23 73.2°F 72.7°F 73.2°F
Mar 24 73.7°F 72.5°F 73.0°F
Mar 25 74.3°F 72.0°F 73.0°F
Mar 26 74.8°F 71.2°F 72.9°F
Mar 27 74.6°F 70.9°F 72.7°F
Mar 28 75.5°F 71.5°F 72.6°F
Mar 29 76.1°F 71.5°F 72.7°F
Mar 30 75.6°F 71.6°F 72.5°F
Mar 31 74.8°F 72.8°F 72.4°F
Apr 1 74.8°F 73.1°F 72.3°F
Apr 2 75.1°F 72.1°F 72.3°F
Apr 3 74.7°F 71.6°F 71.8°F
Apr 4 74.7°F 71.0°F 71.8°F
Apr 5 74.6°F 71.0°F 71.6°F
Apr 6 74.5°F 71.0°F 71.5°F
Apr 7 74.3°F 71.6°F 71.3°F
Apr 8 74.1°F 71.2°F 71.2°F
Apr 9 74.3°F 71.1°F 71.3°F
Apr 10 74.0°F 70.4°F 71.1°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, 64.9°F in Summer, and 65.7°F in Autumn.