August in Madeira Beach is the rainiest and the hottest month of the year. In August, the weather in Madeira Beach is typically hot. Average daily high temperature in August is about 29 degrees above zero. On average, Madeira Beach has 20 rainy, 6 partly cloudy, and 5 sunny days in August. The rains are usually heavy. August as well as July and September is considered the most uncomfortable time to visit Madeira Beach.