What clothes should I wear and what supplies should I bring to Sanya in October? What's the weather like there

Going back to your hometown for the New Year? Then you should bring thick clothes when you go back to your hometown. Don't catch a cold. Remember to wear sandals when you go to Sanya in January. I wear a thin sweater outside and a long-sleeved T-shirt inside, and then I will take a thin coat with me. Wear a thin sweater when it is hot at noon, climb mountains, or wear a long-sleeved T-shirt when it is hot. You can bring short sleeves, but you can bring bikinis. Students in Sanya say that Sanya is a little colder now than before. There are some people who swim in winter, but few, depending on whether you are afraid of the cold. It's just because of people. I'm from Beijing, and I remember diving. Wow, haha, that's cool. Well, have a nice trip ... If you want to play in Sanya cheaply and economically, you can refer to me to answer questions about Sanya. Because it's too trivial and troublesome, I won't go on here.