March in Porto Seguro is the rainiest month of the year. In March, the weather in Porto Seguro is typically hot. Average daily high temperature in March is about 30 degrees above zero. On average, Porto Seguro has 24 rainy, 3 sunny, 3 cloudy, and 1 partly cloudy day in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Porto Seguro.