Northerners are going to settle in Hainan. Can the weather in summer adapt?

I am not from Hainan, but I have been to Hainan in spring, summer, autumn and winter. Say it objectively. In summer in Hainan, the sun is only exposed during the day and it is not too hot at night. Hainan is an island with fast air circulation and no humidity. The island is surrounded by the sea. The sea water is deep, and the water temperature changes little in winter and summer. The water temperature can adjust the temperature, so it won't feel sultry, and the heat in summer is much better than that in Chinese mainland. The biggest climate advantage is that it is not cold in winter, just like spring in the central provinces of Chinese mainland. If you really want to settle in Hainan, I suggest you make a short stay in Hainan in summer to experience it. How can you decide such an important event without personal experience?