Perth weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Excellent
Best time to visit: March – May, September – December
What is the weather like in Perth in May?
In May, Perth is warm: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 21.7 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 64 mm. All in all, May is an excellent month for a holiday in Perth.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 10 h 31 min06:57 – 17:28
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 22 km/haverage daily peak
- Cloud cover
- 44 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+8Australia/Perth
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %65 %
- Few rainy daysweight 30 %74 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Swimwear
- Sunscreen
- A jumper for the evenings
Perth in May: quick answers
Is Perth hot in May?
Warm rather than hot: in May, daytime highs in Perth average 21 °C and nights cool to about 13 °C.
Can you swim in Perth in May?
Yes. In May the sea averages 21.7 °C – refreshing for a swim.
Does it rain much in Perth in May?
Rain falls on about 8 days, adding up to 64 mm.
Perth month by month
The whole year in PerthAll destinations: AustraliaWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)