Perth weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: March – May, September – December
What is the weather like in Perth in August?
In August, Perth is mild: daytime highs average 17 °C, and nights cool down to about 10 °C. The sea averages 19.1 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 91 mm in total. All in all, August is a good month for a holiday in Perth.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 66 | 75 | 88 |
| Day | 17° | 17° | 19° |
| Night | 10° | 10° | 11° |
| Sea | 20° | 19° | 19° |
| Sun | 6 h | 7 h | 8 h |
| Rain days | 13 | 11 | 8 |
More details for August
- Daylight
- 10 h 55 min06:54 – 17:49
- UV index
- 5 · moderateclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 24 km/haverage daily peak
- Cloud cover
- 47 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+8Australia/Perth
How the score comes together
- Temperatureweight 50 %93 %
- Sunshineweight 20 %67 %
- Few rainy daysweight 30 %50 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Perth in August: quick answers
Is Perth hot in August?
No. In August, Perth is mild: daytime highs average 17 °C and nights drop to about 10 °C.
Can you swim in Perth in August?
Only if you don't mind cold water: in August the sea averages just 19.1 °C. Comfortable swimming is possible from December to June.
Does it rain much in Perth in August?
Rain is frequent, with about 11 rainy days and 91 mm in total.
Perth month by month
The whole year in PerthAll destinations: Australia
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)