March in Plettenberg Bay is the sunniest month of the year. In March, the weather in Plettenberg Bay is typically warm. Average daily high temperature in March is about 22 degrees above zero. On average, Plettenberg Bay has 24 sunny, 5 partly cloudy, and 2 rainy days in March. The rains are usually light. March as well as January, February, April, and December is considered the most comfortable time to visit Plettenberg Bay.