Kalmunai: during the year, the average temperature throughout the year is around 30°C. The coldest period of the year is in the month of January where the temperature can drop to 27°C. The hottest month of the year is instead in August where the maximum temperature can reach 32°C. The water temperature, during the hottest months can reach an average of 30°C, during the coldest months it can drop to 27°C.