February in Swansea is the coldest month of the year. In February, the weather in Swansea is typically cold. Average daily high temperature in February is about 7 degrees above zero. On average, Swansea has 19 rainy, 4 sunny, 3 cloudy, and 3 partly cloudy days in February. The rains are usually heavy. February as well as January, March, May, and August is considered the most uncomfortable time to visit Swansea.