August in Mandurah averages a daily high of 18.1°C with nights around 11.1°C. Expect roughly 14.4 wet days totalling 93mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mandurah is October–April.
Based on MANDURAH, AS (1.1km), 1995–2024. 23 years of August data.