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 7:11 am. Next forecast at approx. 7:11 pm.Sully Island Wind Statistics May WindSt-athan (16km)2026AprilMayStrongest 1 May, 202611.2mph WAverage May3.4mphStrongest 4 April, 202631.3mph WSWAverage April10mphStrongest 24 March, 202631.3mph WSWAverage 20269mphClimate (2011–Present)St-athan (16km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2021–20267.8mphWind 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