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

69.4

°F

November 18, 03:57

Trend:

decreasing

Yesterday:

69.4°F

Tomorrow:

69.3°F

Sunrise:

05:08

Sunset:

18:56

Day Length:

13 h. 48 min.

Perth in November

Minimum:

71.4°F

Average:

73.9°F

Maximum:

75.5°F

Sea water temperature in Perth today

As of now, in Perth, the water temperature is 69.4°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.4°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

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 71.1°F on 2015, while the historical minimum was 67.0°F on 2016.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 69.5°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
Nov 4 68.6°F 68.3°F 67.1°F
Nov 5 68.3°F 68.3°F 67.2°F
Nov 6 68.7°F 68.3°F 67.4°F
Nov 7 68.9°F 68.1°F 67.6°F
Nov 8 69.0°F 68.3°F 67.7°F
Nov 9 69.1°F 68.4°F 67.8°F
Nov 10 69.2°F 68.7°F 68.1°F
Nov 11 69.4°F 68.9°F 68.3°F
Nov 12 69.9°F 69.0°F 68.4°F
Nov 13 69.9°F 69.0°F 68.5°F
Nov 14 69.9°F 69.2°F 68.6°F
Nov 15 69.6°F 69.0°F 68.8°F
Nov 16 69.8°F 69.6°F 69.0°F
Nov 17 69.4°F 69.8°F 69.1°F
Nov 18 69.4°F 69.3°F 69.0°F
Nov 19 69.3°F 69.2°F 68.9°F
Nov 20 69.3°F 69.2°F 68.9°F
Nov 21 69.4°F 69.3°F 69.0°F
Nov 22 69.4°F 69.0°F 69.0°F
Nov 23 69.4°F 68.9°F 69.0°F
Nov 24 69.6°F 69.4°F 69.3°F
Nov 25 70.1°F 70.2°F 69.7°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 11, 2025, dipping to 60.6°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.