Llantarnam Wind ForecastUnited KingdomWLTorfaenLlantarnam1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Llantarnam wind forecast issued yesterday at 7:11 pm. Next forecast at approx. 7:11 am.Llantarnam Wind Statistics September WindSt-athan (39km)2025AugustSeptemberStrongest 15 September, 202531.3mph WAverage September12.2mphStrongest 4 August, 202524.6mph WSWAverage August8.4mphStrongest 16 April, 202535.8mph WAverage 20258mphClimate (2011–Present)St-athan (39km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2020–20257.8mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September27.5%15%2.5%CalmNear GaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September20%11.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads