Sully Island Wind ForecastUnited KingdomWLVale of GlamorganSully Island1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Sully Island wind forecast issued today at 1:12 pm. Next forecast at approx. 1:12 am.Sully Island Wind Statistics May WindSt-athan (16km)2025AprilMayStrongest 27 May, 202526.8mph WSWAverage May7.3mphStrongest 16 April, 202535.8mph WAverage April7.8mphStrongest 16 April, 202535.8mph WAverage 20257.5mphClimate (2011–Present)St-athan (16km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2020–20257.7mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average May27.5%15%2.5%CalmNear GaleMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May25%13.75%2.5%CalmNear GaleGet WillyWeather+ to remove ads