August in Ubatuba is the windiest and the sunniest month of the year. In August, the weather in Ubatuba is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Ubatuba has 20 sunny, 6 partly cloudy, and 5 rainy days in August. The rains are usually light. August as well as June and July is considered the most comfortable time to visit Ubatuba.