March in Sunny Isles Beach is the windiest month of the year. In March, the weather in Sunny Isles Beach is typically warm. Average daily high temperature in March is about 24 degrees above zero. On average, Sunny Isles Beach has 20 sunny, 6 partly cloudy, and 5 rainy days in March. The rains are usually light. March as well as February is considered the most comfortable time to visit Sunny Isles Beach.