Groes-wen Wind ForecastUnited KingdomWLCaerphillyGroes-wen1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Groes-wen wind forecast issued today at 1:09 am. Next forecast at approx. 1:09 pm. Wind Speed Wind GustGroes-wen Wind Statistics September WindSt-athan (22km)2026AugustSeptemberStrongest 4 September, 202622.4mph WSWAverage September10.4mphStrongest 18 August, 202620.1mph WAverage August7.5mphStrongest 24 March, 202631.3mph WSWAverage 20268.8mphClimate (2021–2026)St-athan (22km)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