Old St Mellons Wind ForecastUnited KingdomWLCardiffOld St Mellons1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Old St Mellons wind forecast issued today at 1:09 pm. Next forecast at approx. 1:09 am. Wind Speed Wind GustOld St Mellons Wind Statistics September WindSt-athan (26km)2026AugustSeptemberStrongest 4 September, 202622.4mph WSWAverage September8.1mphStrongest 18 August, 202620.1mph WAverage August7.5mphStrongest 24 March, 202631.3mph WSWAverage 20268.6mphClimate (2021–2026)St-athan (26km)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