Trefor Wind ForecastUnited KingdomWLGwyneddTrefor1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met Office Swell Height and Direction Forecast NOAA WaveWatch IIIWind Real-Time Trefor wind forecast issued today at 12:09 am. Next forecast at approx. 12:09 pm.Trefor Wind Statistics December WindValley (29km)2025NovemberDecemberStrongest 5 December, 202542.5mph SSEAverage December18.1mphStrongest 28 November, 202538mph SSWAverage November15.1mphStrongest 24 January, 202551.4mph SAverage 202511.8mphClimate (2011–Present)Valley (29km)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