May in Mandurah averages a daily high of 21.2°C with nights around 13.4°C. Expect roughly 9.6 wet days totalling 78.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Mandurah is October–April.
Based on MANDURAH, AS (1.1km), 1995–2024. 22 years of May data.