March in Porto Seguro is the hottest month of the year. In March, the weather in Porto Seguro is typically hot. Average daily high temperature in March is about 28 degrees above zero. On average, Porto Seguro has 18 rainy, 10 sunny, and 3 partly cloudy days in March. The rains are usually heavy. March as well as January, February, April, and July is considered the most uncomfortable time to visit Porto Seguro.