May Weather on Ambergris Caye Belize
Summertime's warmer, calm water is preferred by many divers. Average water temperature around Belize's Barrier Reef is 82f. May is still solidly in the Belize Dry Season and has significantly lower rainfall than the rest of the year. When rain does come it is usually in mild, short bursts. Temperatures for May fall between 86F (29C) during the day and 76F (24C) at night.
The Dive Shops Daily Blog