August in Hikkaduwa is the coldest month of the year. In August, the weather in Hikkaduwa is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Hikkaduwa has 30 rainy and 1 sunny day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Hikkaduwa.