Hainan Weather & Best Time to Visit: What to Know Before Booking

Written by Veronica | Updated May 02,2026

Hainan weather is characterized by indistinct seasonal temperature shifts and a pronounced contrast between dry and wet seasons. To travel weather wise, the best time to visit Hainan is the dry season from November to April. Average around 20°C to 25°C, this period is a great time for winter escapes.

Sanya and Haikou, the two major tourist cities in Hainan, have significantly different climates. Sanya enjoys a warm, dry, tropical climate year-round, while Haikou experiences hotter summers, cooler winters, and higher humidity.

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• Best Time to Go & Weather by Month
• Travel Seasons in Hainan
• Weather Features of Main Cities
• Insider Tips for Hainan Travel
• Plan Your Hainan Tour
• FAQs about Hainan Weather

Best Time to Go on Vacation & Weather by Month

Hainan Weather by Month

Best Time to Visit

• Best time for decent weather & less crowds: Non-holiday periods in November, December, or January, and late February through March.
• Best Time for water sports & diving in Sanya: Go any time as long as there’s no typhoon. But if you hate being drenched in sweat, October through April is way more comfortable.
• Best time for budget travelers: June – early September (off-season with flight and hotel prices dropping remarkably), but just be prepared for greater humidity and frequent downpours.
• Best time to experience local festival: Sanyuesan Festival (usually falls in March to April).

Time to Avoid

Avoid public holidays, like Chinese New Year (usually falls between late January and early February) and October Golden Week (Oct 1 – Oct 7). It is when Hainan gets very crowded and transport/hotel prices spike. Also try to avoid May to October, especially July – August for heavy rain and September – October for typhoons.

Travel Seasons in Hainan

Peak Season (November – April): Dry & Sunny

November: 22°C – 28°C. The air is really crisp and refreshing. In the mornings and evenings it is cool. During the day it is warm.

December to February: 17°C – 24°C. Dry season. In the north, such as Haikou, the weather can feel damp and cool. While in the south, like Sanya, it remains warm and summer-like.

March: 21°C – 29°C. The temperatures rise quickly and the humidity increases.

April: 24°C – 32°C. Heat and humidity rising, Hainan enters the pre-summer period. Still good for water activities.

• What to wear: Light summer clothes (e.g. T-shirts, shorts) and a thin cardigan or light jacket in November, March and April. In Sanya, summer outfits with a jacket. In Haikou and the central mountainous areas during January and February, wear summer outfits with sweatshirts or a light down jacket.
• Recommended activities: Go surfing and diving around Sanya and Wanning; Trekking in Wuzhishan or Yanoda Rainforest; Hot-spring spa.
• Pros: Good climate (less rain and warmer than most areas of the country); great scenery (gentle sunshine and high visibility underwater).
• Cons: High prices (especially when it comes to Chinese New Year. The airfares and hotels prices can double); crowded than usual.

Shoulder Season (April – May, September – November): Transition Months

April – May: 23°C – 30°C. The weather warms up quickly, rainfall increases significantly in May.

September – November: 24°C – 32°C. The rainy season has not completely ended yet, and you may feel hot, but within a reasonable range. October has the most concentrated rainfall. It becomes cool and comfortable from November onward.

• What to wear: Prepare thin cardigan or sun‑protection shirt for cool mornings, evenings, or air‑conditioned rooms; In Spetember and October, summer clothes are enough. Always bring rain gear.
• Recommended activities: Enjoy lychee blooming in Haikou. Celebrate ethnic festival Sanyuesan on the third day of the third lunar month. You can see mass parades, riverside stage performances, drone light shows, and bonfire parties during the festival. Go diving.
• Pros: Pleasant weather (around 22 – 30°C); fewer tourists (just after the Chinese New Year and winter holidays); cost-effective.
• Cons: Higher temperature; more rain (rainfall increases noticeably from May); humid weather (ground‑floor areas may feel damp and muggy).

Low Season (June – September): Rainy & Typhoon Risk

Temperature averages around 28 – 30°C. It feels very hot at noon. Due to the humid air, your sensible temperature will be higher than the actual temperature. The muggy, sticky heat is noticeable. Rainfall is frequent and heavy.

• What to wear: Short‑sleeve T‑shirts, tank tops, and camisoles (better be quick‑dry, breathable fabrics).
• Recommended activities: Hainan International Tourism Island Fun Festival (running 30 days with family educational activities, beach fireworks, electronic water parties); water sports (high water temperature and good wave conditions); canyon rafting (one of the most thrilling summer activities).
• Pros: Super-high cost-effective; less crowds; quieter and more relaxed experience; more fresh fruit and seafood.
• Cons: Oppressively hot and sticky weather; frequent typhoons (strong rain and low‑pressure systems can cause flight delays, ferry cancellations, closed beaches); risk of seeing more mosquitoes and insects.

Weather Features of Main Hainan Cities

• Sanya: The city has a tropical monsoon climate, featuring mild temperatures year-round, no harsh cold in winter, and no intense hot in summers. November to March is the most comfortable period. It is great for beach time, swimming, coastal walks and other outdoor activities in warm weather, particularly in the drier months.
• Haikou: Typically hot and humid. Compared to southern Hainan, the weather here is less predictable.  Here, you can enjoy sightseeing, food trips, museum visits, shopping, and other flexible outdoor activities.
• Wanning: Wanning enjoys tropical climate. The wet season (May – Oct.) is hot, muggy, and overcast. Whereas, the dry season (Nov. – Apr. next year) is warm, windy, partly cloudy and muggy. So the best plan is to go surfing or other outdoor activities in the dry season.
• Baoting: Located in the inland, it is a great base for nature trips, hot-spring/relaxation style itineraries and lighter outdoor plans.

Insider Tips for Hainan Travel

• Book flights and hotels early, especially if you travel there from November to April. The period is the high season in Hainan, so popular accommodations and itineraries can be easily sold out.
• Use high factor sun protection (SPF 50+ sunscreen, wide brimmed hat, sunglasses, sun protective clothing and reapply regularly). Never relax your guard, especially if you are at the seaside or go out on a sunny day.
• Don’t over schedule your trips with kids or seniors. Try to split each day into several parts, like outdoor activities at morning and indoor rest at afternoon. This may help you acclimatise to heat, sun or rain.
• Take insect repellent if you are going to rain-forests, wetlands or rural areas. Some natural scenery in Hainan is humid and sees more mosquitoes.

Plan Your Hainan Tour with China Xian Tour

Planning your trip to Hainan? At China Xian Tour, we specialize in matching you to the island’s best weather windows. Whether you’re chasing the dry‑season warmth, or the affordable resorts in low season, we tailor your trip to maximize your experience. Our professional team can arrange relaxed coastal itineraries, rain‑friendly indoor options, and secret spots only known to locals, so that you enjoy Hainan vacation without the stress.

FAQs about Hainan Weather

What is the best time to travel with elderly and small children?

The time from October to the following May is when Hainan’s weather stays stable, warm, and comfortable. So it is suitable for family trips.

From May to September, the relatively frequent rainy days and possible typhoons make it less ideal for itineraries with elderly people and children.

Is there a great difference between Sanya and Haikou weather?

The average winter temperature in Haikou is lower than that in Sanya. Both cities are hot from May to October. Sanya may be sunnier and hotter, and Haikou is slightly cooler.

Does it rain every day in the rainy season? What can I do on rainy days?

• The rainy season is usually from May to October, but it does not rain heavily every day. There are frequent showers and short‑time heavy precipitation. The downpour often finishes in an hour. There are also lots of indoor and semi‑indoor activities for you on rainy days:
• Indoor attractions: Hainan Provincial Museum, Haikou City Museum, indoor aquarium, tropical zoo, and exhibition hall are all great options.
• Hot-spring resorts: Nantian Hot Spring, Guantang Hot Spring and other spa-type hot-spring resorts. In the rain, the atmosphere is more enjoyable.
• Malls and shopping areas: Big shopping complexes like Sanya International Duty Free City and Haikou Riyue Plaza.