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The best time to visit Haikou is November through March, the dry season, when daytime highs run 21-25°C (70-77°F), rain is light, and humidity is at its lowest. The worst period for weather is August and September, when typhoons are most likely and monthly rainfall tops 250 mm. Here is exactly when to go depending on what you prioritize, as part of our Haikou travel guide.
Best Time to Visit Haikou for Weather: November to March
November to March is the dry season and the most pleasant stretch. December and January are the driest and coolest months, with highs around 21°C (70°F), lows near 16°C (61°F), and under 40 mm of rain. March warms to 26°C (79°F) before humidity returns in April. Sea temperature stays around 21-24°C (70-75°F) in this window, which suits hardy swimmers at Holiday Beach and is fine for everyone else. This is the window to hike the Haikou Volcanic Cluster Geopark and walk Qilou Old Street. Pair this with our Haikou weather by month page for daily detail.
Best Time to Visit Haikou for Lower Prices: May to September
The summer wet season is the cheapest time to book. Hotel rates drop 30-50% from June through September because mainland holiday traffic shifts to cooler destinations, and the heat plus typhoon risk keeps occupancy low. Five-star beach resorts that charge full rate in February often run 40% cheaper in August. The tradeoff is 250 mm-plus monthly rain and the chance of a typhoon canceling flights, so book refundable rates. See where to stay in Haikou for hotel areas and price tiers.
Best Time to Visit Haikou for Fewer Crowds: Avoid Golden Week and Spring Festival
Haikou is a domestic holiday hub, so crowds spike during Chinese New Year (Spring Festival, late January or February) and the National Day Golden Week (October 1-7). During those periods train tickets sell out, hotels charge peak rates, and attractions like the volcano park have long queues. The quietest months are May, June and September, when school is in session and the weather deters day-trippers. To find space even in busy weeks, our Haikou neighborhoods guide points to the quieter districts, and our Haikou travel tips page covers the transport and visa logistics.
Best Time to Visit Haikou: Months to Avoid and Why
Avoid August and September if you can: August averages 293 mm of rain and September 269 mm, and this is the core of typhoon season. Hainan is hit by an average of 2 to 3 typhoons a year, most often between July and September, which can ground flights at Haikou Meilan International Airport (HAK) for a day or two. Avoid the first week of October (National Day) and the Spring Festival week for crowds and pricing. For a full list of what is on when, see our Haikou events and festivals calendar, and for the sights themselves, start with things to do in Haikou.
