What is the current water temperature in Perth?

Q: What is the current water temperature in Perth?

As of now, in Perth, the water temperature is 17.25°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Australia > Perth

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.

63.1

°F

July 23, 06:51

Trend:

decreasing

Yesterday:

63.1°F

Tomorrow:

62.9°F

Sunrise:

07:12

Sunset:

17:34

Day Length:

10 h. 22 min.

Perth in July

Minimum:

71.7°F

Average:

73.8°F

Maximum:

75.5°F

Sea water temperature in Perth today

As of now, in Perth, the water temperature is 63.1°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 fall a bit.

Recent sea temperature and forecast

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 65.7°F on 2017, while the historical minimum was 63.1°F on 2025.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 62.7°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
Jul 9	62.7°F	63.8°F	64.7°F
Jul 10	63.1°F	63.5°F	64.6°F
Jul 11	63.0°F	63.2°F	64.5°F
Jul 12	63.1°F	62.4°F	64.3°F
Jul 13	62.5°F	62.7°F	64.3°F
Jul 14	63.4°F	63.0°F	64.5°F
Jul 15	63.2°F	63.1°F	64.5°F
Jul 16	62.7°F	63.3°F	64.4°F
Jul 17	62.5°F	62.9°F	64.4°F
Jul 18	62.9°F	63.3°F	64.6°F
Jul 19	62.9°F	63.1°F	64.4°F
Jul 20	62.9°F	62.9°F	64.4°F
Jul 21	62.8°F	62.6°F	64.3°F
Jul 22	63.1°F	62.9°F	64.4°F
Jul 23	63.1°F	63.1°F	64.3°F
Jul 24	62.9°F	63.2°F	64.1°F
Jul 25	62.8°F	63.1°F	64.1°F
Jul 26	62.7°F	63.0°F	64.0°F
Jul 27	62.7°F	62.7°F	64.0°F
Jul 28	62.7°F	62.5°F	64.0°F
Jul 29	62.8°F	62.3°F	64.1°F
Jul 30	62.6°F	62.2°F	63.9°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 90 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 73.6°F in Winter, 70.8°F in Spring, 64.7°F in Summer, and 65.7°F in Autumn.