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 pm. Next forecast at approx. 1:09 am. Wind Speed Wind GustGlan-yr-afon (Llandderfel) Wind Statistics August WindLake Vyrnwy Saws (23km)2026JulyAugustStrongest 5 August, 202620.1mph SWAverage August6.7mphStrongest 1 July, 202629.1mph SWAverage July7mphStrongest 4 April, 202649.2mph SWAverage 20268.6mphClimate (2021–2026)Lake Vyrnwy Saws (23km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 23 January, 202451.4mph SWAverage 2021–20268.1mphWind 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