We will be leaving for Guam this weekend. I saw the 3-day weather forecast. It says it'll be sunny but will experience thunderstorms and rain any time of the day. Would it be safe to go to the waterpark or to the beach in the afternoons. We will be staying for a very short period of time since we have bought a package tour. It'll be nice if I'll have an idea on what to do in Guam when it rains. Any advise? Thanks.