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 18.81°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.

65.9

°F

October 1, 11:16

Trend:

increasing

Yesterday:

65.6°F

Tomorrow:

66.1°F

Sunrise:

05:55

Sunset:

18:18

Day Length:

12 h. 23 min.

Perth in October

Minimum:

71.7°F

Average:

74.2°F

Maximum:

76.0°F

Sea water temperature in Perth today

As of now, in Perth, the water temperature is 65.9°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 1.8°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

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 65.9°F on 2023, while the historical minimum was 61.2°F on 2016.

latest data

last year

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 66.1°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
Sep 17	65.1°F	62.3°F	63.6°F
Sep 18	65.5°F	62.4°F	63.7°F
Sep 19	65.4°F	62.8°F	63.9°F
Sep 20	64.8°F	62.4°F	63.7°F
Sep 21	65.1°F	62.6°F	63.6°F
Sep 22	65.4°F	62.8°F	63.5°F
Sep 23	65.8°F	63.4°F	63.7°F
Sep 24	66.3°F	63.3°F	63.6°F
Sep 25	66.5°F	63.6°F	63.8°F
Sep 26	66.0°F	64.1°F	63.8°F
Sep 27	65.5°F	64.3°F	63.9°F
Sep 28	65.3°F	64.3°F	63.8°F
Sep 29	65.5°F	64.4°F	64.0°F
Sep 30	65.6°F	64.3°F	63.8°F
Oct 1	65.9°F	64.5°F	64.1°F
Oct 2	66.1°F	65.1°F	64.3°F
Oct 3	66.2°F	65.6°F	64.4°F
Oct 4	66.1°F	65.5°F	64.3°F
Oct 5	65.9°F	65.2°F	64.1°F
Oct 6	66.0°F	65.4°F	64.3°F
Oct 7	66.1°F	64.7°F	64.3°F
Oct 8	66.3°F	64.8°F	64.5°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 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 August 16, 2026, dipping to 59.8°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.