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 16.93°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.

62.5

°F

September 18, 11:54

Trend:

increasing

Yesterday:

62.3°F

Tomorrow:

62.6°F

Sunrise:

06:12

Sunset:

18:10

Day Length:

11 h. 58 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 62.5°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 1.1°F lower 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 65.7°F on 2019, while the historical minimum was 61.3°F on 2018.

latest data

last year

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 minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 62.3°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
Sep 4	61.7°F	62.7°F	62.5°F
Sep 5	62.0°F	63.0°F	62.5°F
Sep 6	62.1°F	62.9°F	62.4°F
Sep 7	62.0°F	62.5°F	62.3°F
Sep 8	62.2°F	62.8°F	62.4°F
Sep 9	61.5°F	62.9°F	62.5°F
Sep 10	61.0°F	62.7°F	62.6°F
Sep 11	60.6°F	62.9°F	62.6°F
Sep 12	60.9°F	63.1°F	62.8°F
Sep 13	61.3°F	63.6°F	63.0°F
Sep 14	61.6°F	64.1°F	63.1°F
Sep 15	61.9°F	64.4°F	63.1°F
Sep 16	62.2°F	64.6°F	63.2°F
Sep 17	62.3°F	65.0°F	63.4°F
Sep 18	62.5°F	65.0°F	63.6°F
Sep 19	62.6°F	65.1°F	63.8°F
Sep 20	62.4°F	64.6°F	63.6°F
Sep 21	62.2°F	64.1°F	63.4°F
Sep 22	62.2°F	63.8°F	63.3°F
Sep 23	62.2°F	64.0°F	63.4°F
Sep 24	62.2°F	64.1°F	63.4°F
Sep 25	62.3°F	64.0°F	63.4°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.