Glan-yr-afon (Llandderfel) Wind ForecastUnited KingdomWLGwyneddGlan-yr-afon (Llandderfel)1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Glan-yr-afon (Llandderfel) wind forecast issued today at 1:09 am. Next forecast at approx. 1:09 pm.Glan-yr-afon (Llandderfel) Wind Statistics August WindLake Vyrnwy Saws (23km)2025JulyAugustStrongest 4 August, 202535.8mph SWAverage August7.1mphStrongest 4 July, 202533.6mph SWAverage July5.7mphStrongest 24 January, 202547mph SWAverage 20257.3mphClimate (2011–Present)Lake Vyrnwy Saws (23km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 23 January, 202451.4mph SWAverage 2020–20258mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average August20%11.25%2.5%CalmStrongAugust Wind RoseAugust (5 Year Average)5 Year Average Annual5 Year Average August22.5%12.5%2.5%CalmStrongGet WillyWeather+ to remove ads