November in Portoroz is the rainiest and the cloudiest month of the year. In November, the weather in Portoroz is typically warm. Average daily high temperature in November is about 12 degrees above zero. On average, Portoroz has 18 rainy, 8 sunny, and 4 partly cloudy days in November. The rains are usually heavy. November as well as January, February, and December is considered the most uncomfortable time to visit Portoroz.