Other facts from our historical weather data: Which is the warmest month in Porto Seguro? February has an average maximum temperature of 30°C (86°F) and is the warmest month of the year. Which is the coldest month in Porto Seguro? The coldest month is August with an average maximum temperature of 26°C (79°F). Which is the wettest month in Porto Seguro? November tops the wettest month list with 167mm (6.6 in) of rainfall. Which is the driest month in Porto Seguro? September is the driest month with 63mm (2.5 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.