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 1:09 am. Next forecast at approx. 1:09 pm.South Stack Wind Statistics July WindValley (12km)2025JuneJulyStrongest 4 July, 202529.1mph SSWAverage July9.4mphStrongest 3 June, 202538mph SAverage June12.7mphStrongest 24 January, 202551.4mph SAverage 202510.7mphClimate (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 July15%8.75%2.5%CalmNear GaleJuly Wind RoseJuly (5 Year Average)5 Year Average Annual5 Year Average July22.5%12.5%2.5%CalmNear GaleGet WillyWeather+ to remove ads