In Sep, Haikou typically sees ~30°C daytime highs and 27 rainy days.
Best time to visit Haikou — climate
About Haikou
Haikou (海口 Hǎikǒu) is the capital and largest city of Hainan Province in southern China and is at the north end of the Hainan Island. Haikou is a tropical coastal city that, as one of the least developed provincial capitals, has a somewhat laid-back atmosphere.
Flight prices are real fares travellers found in the last 48 hours, refreshed daily — the booking site confirms the final price. Train, bus and ferry fares are shown on the operators' booking sites. Weather data by Open-Meteo; exchange rates: ECB reference. Data updated 2026-09-09. Some links earn Stayonomy a commission at no cost to you.
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