Sumburgh: are you wondering about the weather you might find during your holiday? Befor organizing a holiday we always think about the wheather we might find when we get there. In Sumburgh the average yearly temperature is 9°C. During the hottest month, which in this case is August, the temperature can get up to 13°C and the temperature of the sea reaches 13°C. Instead the coldest month is February, reaching a minimum temperature of 6°C. Here instead the water temperature drops to 7°C.