August in Sozopol is the warmest month of the year. In August, the weather in Sozopol is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Sozopol has 22 sunny, 5 rainy, and 4 partly cloudy days in August. The rains are usually light. August as well as July and September is considered the most comfortable time to visit Sozopol.