Water temperature in Perth (WA) in January

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Is it warm enough to swim in Perth in January? Average water temperature in Perth in January is 22.9°C and therefore suitable for comfortable swimming. The warmest sea in Perth in January is 25.3°C, and the coldest is 20.9°C. Average high air temperature in Perth in January is 31°C, and average low temperature is 18°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Perth

Changes water temperature in Perth in January 2025, 2024

To get an accurate forecast for the water temperature in Perth for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Perth, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of January.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 January	23.8°C	23.6°C	21.2°C	23.8°C
2 January	23.5°C	23.2°C	21.6°C	23.6°C
3 January	23.8°C	23.6°C	21.5°C	23.8°C
4 January	23.6°C	23.2°C	21.6°C	24.1°C
5 January	23.8°C	23.3°C	21.5°C	24°C
6 January	23.9°C	23.5°C	20.9°C	24.2°C
7 January	23.9°C	23.6°C	20.9°C	24.4°C
8 January	23.7°C	23.8°C	21.2°C	24.6°C
9 January	23.7°C	23.6°C	20.9°C	24°C
10 January	23.6°C	23.8°C	21°C	23.8°C
11 January	23.9°C	23.9°C	21.1°C	23.9°C
12 January	24°C	24.2°C	21.3°C	24.2°C
13 January	24.2°C	24.1°C	21.6°C	24.2°C
14 January	23.9°C	24.8°C	21.4°C	24.8°C
15 January	23.8°C	24.9°C	21.4°C	24.9°C

Day	2025	2024	Min	Max
16 January	24°C	25.3°C	21.6°C	25.3°C
17 January	23.7°C	25.3°C	21.4°C	25.3°C
18 January	23.9°C	24.8°C	21.4°C	24.8°C
19 January	24.5°C	25.1°C	21°C	25.1°C
20 January	24.6°C	25.3°C	21.1°C	25.3°C
21 January	24.3°C	25.3°C	21.2°C	25.3°C
22 January	24.3°C	24.7°C	21.3°C	24.9°C
23 January	24.2°C	24.5°C	21.5°C	25°C
24 January	24.2°C	24.1°C	21.7°C	24.8°C
25 January	24.6°C	23.9°C	21.6°C	25.2°C
26 January	24.6°C	23.4°C	21.6°C	24.8°C
27 January	24.4°C	23.3°C	21.7°C	24.7°C
28 January	24.7°C	23°C	21.9°C	24.7°C
29 January	25°C	23.1°C	22°C	25°C
30 January	25.2°C	23.5°C	22.1°C	25.2°C
31 January	25.2°C	23.9°C	21.8°C	25.2°C

Average water temperature in Perth in January over a decade

2016	2017	2018	2019	2020
22.7°C	22°C	22.7°C	22.6°C	23.4°C

2021	2022	2023	2024	2025
23.6°C	24.2°C	23°C	24.1°C	24.1°C

Perth sea state in January

Chart comparing the height of waves in Perth in January over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Weather and climate in Perth in January

This data display average monthly climate indicators in Perth in January based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature31°C
Average LOW temperature18°C
Average humidity
39
Average rainfall days2 days
Average rainfall0.6''/15mm
Average daylight14h
Average sunshine11.6h
Average UV index12

Perth water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in January. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Fremantle	22.9°C	20.9°C	25.3°C
North Fremantle	23°C	20.9°C	25.6°C
Coogee	22.9°C	20.9°C	25.5°C
Leighton Beach	22.9°C	20.9°C	25.2°C
Cottesloe	23°C	20.9°C	25.4°C
Mosman Park	23°C	20.9°C	25.4°C
Peppermint Grove	23°C	20.9°C	25.4°C
Attadale	23.1°C	21°C	25.3°C
Dalkeith	23.1°C	21°C	25.3°C
Swanbourne	22.9°C	20.9°C	25.1°C

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Our report for Perth is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature