Sanya is located at the southernmost tip of Hainan Island and belongs to the tropical monsoon climate region. There is no real winter in Sanya. Summer gives way to autumn, and autumn gives way to spring. In midsummer, except for a short period of slight heat at noon, sea breezes blow in the morning and evening, making people feel very cool. In the depth of winter, Sanya is full of spring-like vitality. Even in the coldest January, due to the influence of the Pacific warm current, both the average temperature and the seawater temperature in Sanya are above 20 degrees Celsius, making people feel as warm as in spring.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| High (℃) | 27.3 | 28.5 | 30.3 | 32.2 | 33.1 | 34.1 | 33.1 | 34.2 | 33.2 | 31.7 | 29.2 | 26.3 |
| High(℉) | 81.1 | 83.3 | 86.5 | 90.0 | 91.6 | 93.4 | 91.6 | 93.6 | 91.8 | 89.1 | 84.6 | 79.3 |
| Low (℃) | 19.8 | 19.7 | 22.4 | 23.6 | 25.1 | 26.1 | 25.6 | 25.8 | 24.8 | 22.8 | 21.6 | 18.3 |
| Low(℉) | 67.6 | 67.5 | 72.3 | 74.5 | 77.2 | 79.0 | 78.1 | 78.4 | 76.6 | 73.0 | 70.9 | 64.9 |

Weather: In spring, the weather in Sanya is very warm, with occasional light rain, fresh air, cool breeze and sunny days. The temperature is between 18 and 32 degrees, with an average of about 28 degrees, which is very suitable for wearing short-sleeved clothes and dresses with medium thickness.
Clothing: During the day, light and breathable outfits are perfect. You can wear cotton or linen shirts, thin long dresses, and T - shirts. At night, it's advisable to bring a light outer layer like a thin cardigan or a light windbreaker, as the temperature drops slightly.
Things to do: The climate in Sanya is pleasant in spring. You can visit the Nanshan Cultural Tourism Zone to admire the Guanyin Statue on the Sea and pray for blessings. Also, you can taste the healthy and delicious vegetarian food there. Then, you can go to Sanya Bay and experience coral reef planting under professional guidance. Moreover, you can go to the Luhuitou Scenic Area or Yalong Bay National Tourism Resort to capture the beautiful spring scenery of Sanya.

Weather: Summer is hot and a little humid, and it often rains. The temperature can reach 34 degrees, the average temperature is between 25 and 34 degrees, and the humidity will rise to 90%.
Clothing: For summer clothes, choose short sleeves and shorts that will keep you cool, with one or two long sleeves in case of rainy, cold days. Rain gear, sunshade, sunglasses, and sunscreen are also essential as it is important to protect the skin against sunburn.
Things to do: It's hot in Sanya during summer. You can wear stylish bikinis to Sanya Atlantis Resort or Wuzhizhou Island to experience exciting water sports, such as banana boats and jet skis. You can also go to West Island. It has beautiful scenery and is very suitable for diving. However, beginners are advised to go diving under the guidance of professional instructors.
Note: It's too hot in summer for fishing. The weather has a medium-intensity UV radiation. When going out, it is recommended to apply sunscreen skincare products and carry a sun umbrella, a fisherman's hat, sun-protective clothing, and waterproof beach shoes. These can not only prevent your feet from getting burned but also allow you to play in the water. In addition, there are many mosquitoes in Sanya in the summer evenings, especially in places with a lot of grass and trees like the Coconut Dream Promenade and the Forest Park. So be sure to prepare mosquito-repellent stickers and mosquito-repellent spray in advance. Before going out, spray areas such as your ankles and calves thoroughly. Don't let mosquitoes spoil our good mood.

Weather: In autumn, the weather began to cool, and the temperature and humidity dropped. The temperature was between 20-30 degrees Celsius, with an average of about 25 degrees, and the humidity was about 80%. The weather was sunny and dry.
Clothing: Wear summer clothes and bring your long sleeves, trousers, overcoats, and wind-proof coats, in case the temperature drops.
Things to do: The weather is warm in autumn. You can visit Sanya Eternal Love Scenic Area to watch the large-scale song and dance show "Sanya Eternal Love". With the help of high-end equipment and professional actors, the performance is very shocking. In romantic Sanya, you can also go to the End of the Earth (Tianya Haijiao) to plan a grand proposal ceremony. It is said that confessing one's love here can make love last forever.

Weather: The climate in Sanya in winter is warmer, but it is not the warmest season. The temperature ranges from 24-28 degrees Celsius, with an average of about 27 degrees Celsius and a humidity of about 73%. The weather is cool and cool, which is very suitable for tourists to carry out seaside activities.
Clothing: You can get away with wearing long - sleeved shirts, light sweaters, and jeans during the day. At night, a thicker coat might be needed, especially in December and January.
Things to do: Sanya remains warm in winter, making it a great place to explore the intangible cultural heritage artworks and techniques of ethnic minorities in Hainan at the Li and Miao Villages in Sanya. You can also enjoy the Li ethnic group's long-table banquet. Sitting around with family or friends and savoring delicious food is a truly enjoyable experience. Yazhou Ancient City is also worth a visit. There, you can play a treasure-hunting game and explore the ancient and mysterious legends of the city in a fun way.