In March, the weather in Sejdisfjordur is typically freezing. Average daily high temperature in March is about zero. On average, Sejdisfjordur has 18 snowy, 10 rainy, 2 sunny, and 1 cloudy day in March. The snowfalls are usually heavy. March as well as January, April, May, and June is considered the most uncomfortable time to visit Sejdisfjordur.