May in Geelong averages a daily high of 17.3°C with nights around 7.6°C. Expect roughly 9.6 wet days totalling 33.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Geelong is November–April.
Based on AVALON AIRPORT, AS (16.7km), 1995–2024. 28 years of May data.