Trefnanney Wind ForecastUnited KingdomWLPowysTrefnanney1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Trefnanney wind forecast issued today at 7:10 pm. Next forecast at approx. 7:10 am.Trefnanney Wind Statistics October WindLake Vyrnwy Saws (19km)2025SeptemberOctoberStrongest 1 October, 202517.9mph SWAverage October7.8mphStrongest 15 September, 202538mph SWAverage September7.6mphStrongest 24 January, 202547mph SWAverage 20257.3mphClimate (2011–Present)Lake Vyrnwy Saws (19km)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 October20%11.25%2.5%CalmNear GaleOctober Wind RoseOctober (5 Year Average)5 Year Average Annual5 Year Average October22.5%12.5%2.5%CalmNear GaleGet WillyWeather+ to remove ads