In March, the weather in Seagrove Beach is typically cold. Average daily high temperature in March is about 8 degrees above zero. On average, Seagrove Beach has 11 partly cloudy, 10 rainy, 9 sunny, and 1 cloudy day in March. The rains are usually heavy. March as well as January, February, May, and December is considered the most uncomfortable time to visit Seagrove Beach.