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 7:11 am. Next forecast at approx. 7:11 pm.Trefor Wind Statistics May WindValley (29km)2025AprilMayStrongest 3 May, 202520.1mph NAverage May6.2mphStrongest 13 April, 202524.6mph SSWAverage April7.8mphStrongest 24 January, 202551.4mph SAverage 202510.2mphClimate (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 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