In May, the weather in Sant Pol de Mar is typically warm. Average daily high temperature in May is about 20 degrees above zero. On average, Sant Pol de Mar has 13 rainy, 9 sunny, 8 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Sant Pol de Mar.