We highly suggest bringing light colored, SPF (sun protection) rated clothing. The tropical sun here can be intense, and the proper gear can make your vacation much more enjoyable.
A lightweight hat, and long sleeve shirts really help. We find the “Quick dry” lycra type material clothes (like for sports) works much better than cotton. It drys quickly, and allows the breeze to blow through, providing a cooling effect like air conditioning compared to a sweat soaked cotton shirt.
Check your local sports store or fishing outfitter - even affordable athletic brands from sport stores work great.