August in Ilhabela is the windiest and the sunniest month of the year. In August, the weather in Ilhabela is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Ilhabela has 20 sunny, 7 partly cloudy, and 4 rainy days in August. The rains are usually moderate. August as well as July is considered the most comfortable time to visit Ilhabela.