August in Madeira Beach is the cloudiest 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 30 degrees above zero. On average, Madeira Beach has 19 rainy, 10 sunny, and 2 partly cloudy days in August. The rains are usually heavy. August as well as June, July, and September is considered the most uncomfortable time to visit Madeira Beach.