South Stack Wind ForecastUnited KingdomWLIsle of AngleseySouth Stack1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met Office Swell Height and Direction Forecast NOAA WaveWatch IIIWind Real-Time South Stack wind forecast issued today at 7:11 am. Next forecast at approx. 7:11 pm.South Stack Wind Statistics May WindValley (12km)2026AprilMayStrongest 19 May, 202631.3mph SSEAverage May11.8mphStrongest 4 April, 202649.2mph SSWAverage April12.9mphStrongest 4 April, 202649.2mph SSWAverage 202612.8mphClimate (2011–Present)Valley (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202153.7mph SSWAverage 2021–202612.1mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average May15%8.75%2.5%CalmGaleMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May25%13.75%2.5%CalmGaleGet WillyWeather+ to remove ads