October in Swansea is the rainiest month of the year. In October, the weather in Swansea is typically warm. Average daily high temperature in October is about 15 degrees above zero. On average, Swansea has 12 rainy, 9 partly cloudy, 8 sunny, and 2 cloudy days in October. The rains are usually moderate. October as well as May, June, July, and August is considered the most uncomfortable time to visit Swansea.