March in Jacksonville Beach is the windiest month of the year. In March, the weather in Jacksonville Beach is typically warm. Average daily high temperature in March is about 21 degrees above zero. On average, Jacksonville Beach has 12 sunny, 8 rainy, 7 partly cloudy, and 4 cloudy days in March. The rains are usually heavy. March as well as April and November is considered the most comfortable time to visit Jacksonville Beach.