August in Praia Grande is the sunniest month of the year. In August, the weather in Praia Grande is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Praia Grande has 18 sunny, 8 partly cloudy, and 5 rainy days in August. The rains are usually moderate. August as well as June is considered the most comfortable time to visit Praia Grande.