Heolgerrig Wind ForecastUnited KingdomWLMerthyr TydfilHeolgerrig1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Heolgerrig wind forecast issued today at 7:08 pm. Next forecast at approx. 7:08 am. Wind Speed Wind GustHeolgerrig Wind Statistics September WindSt-athan (37km)2026AugustSeptemberStrongest 19 September, 202624.6mph WSWAverage September8.9mphStrongest 18 August, 202620.1mph WAverage August7.5mphStrongest 24 March, 202631.3mph WSWAverage 20268.7mphClimate (2021–2026)St-athan (37km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2021–20267.9mphWind 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