August in The Sunny Beach is the warmest month of the year. In August, the weather in The Sunny Beach is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, The Sunny Beach has 20 sunny, 6 rainy, and 5 partly cloudy days in August. The rains are usually light. August as well as September is considered the most comfortable time to visit The Sunny Beach.