Porth Diana Wind ForecastUnited KingdomWLIsle of AngleseyPorth Diana1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met Office Swell Height and Direction Forecast NOAA WaveWatch IIIWind Real-Time Porth Diana wind forecast issued today at 12:12 pm. Next forecast at approx. 12:12 am.Porth Diana Wind Statistics December WindValley (6km)2025NovemberDecemberStrongest 9 December, 202553.7mph SAverage December19.1mphStrongest 28 November, 202538mph SSWAverage November15.1mphStrongest 9 December, 202553.7mph SAverage 202511.9mphClimate (2011–Present)Valley (6km)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 December15%8.75%2.5%CalmStormDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December20%11.25%2.5%CalmStormGet WillyWeather+ to remove ads