Trewen Wind ForecastUnited KingdomWLPowysTrewen1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Trewen wind forecast issued today at 7:11 pm. Next forecast at approx. 7:11 am.Trewen Wind Statistics September WindLake Vyrnwy Saws (31km)2025AugustSeptemberStrongest 15 September, 202538mph SWAverage September9.1mphStrongest 4 August, 202535.8mph SWAverage August6.6mphStrongest 24 January, 202547mph SWAverage 20257.4mphClimate (2011–Present)Lake Vyrnwy Saws (31km)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 September20%11.25%2.5%CalmNear GaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September27.5%15%2.5%CalmNear GaleGet WillyWeather+ to remove ads