April in Mirissa is the hottest month of the year. In April, the weather in Mirissa is typically hot. Average daily high temperature in April is about 28 degrees above zero. On average, Mirissa has 26 rainy, 2 sunny, and 2 partly cloudy days in April. The rains are usually heavy. April as well as March, May, June, and July is considered the most uncomfortable time to visit Mirissa.