March in Mossel Bay is the rainiest month of the year. In March, the weather in Mossel Bay is typically warm. Average daily high temperature in March is about 25 degrees above zero. On average, Mossel Bay has 15 sunny, 8 rainy, 7 partly cloudy, and 1 cloudy day in March. The rains are usually moderate. March as well as January, February, April, and May is considered the most comfortable time to visit Mossel Bay.