April in Zhoushan averages a daily high of 19.9°C with nights around 11.5°C. Expect roughly 13.1 wet days totalling 106.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Zhoushan is October.
Based on DINGHAI, CH (9.8km), 1995–2024. 25 years of April data.