May in Hikkaduwa is the rainiest and the cloudiest month of the year. In May, the weather in Hikkaduwa is typically warm. Average daily high temperature in May is about 27 degrees above zero. On average, Hikkaduwa has 30 rainy and 1 sunny day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Hikkaduwa.