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 yesterday at 7:10 pm. Next forecast at approx. 7:10 am.South Stack Wind Statistics August WindValley (12km)2025JulyAugustStrongest 4 August, 202538mph SSWAverage August9.3mphStrongest 15 July, 202533.6mph SSWAverage July9mphStrongest 24 January, 202551.4mph SAverage 202510.4mphClimate (2011–Present)Valley (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202153.7mph SSWAverage 2020–202512mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average August15%8.75%2.5%CalmNear GaleAugust Wind RoseAugust (5 Year Average)5 Year Average Annual5 Year Average August20%11.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads