May in Newcastle averages a daily high of 20.7°C with nights around 12.6°C. Expect roughly 9.8 wet days totalling 118mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Newcastle is August–May.
Based on NEWCASTLE NOBBYS SIGNAL STATIO, AS (2.1km), 1995–2024. 28 years of May data.