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 12:10 pm. Next forecast at approx. 12:10 am.Old St Mellons Wind Statistics March WindSt-athan (26km)2026FebruaryMarchStrongest 13 March, 202629.1mph WSWAverage March7.7mphStrongest 20 February, 202629.1mph WSWAverage February10mphStrongest 30 January, 202629.1mph WSWAverage 20268.8mphClimate (2011–Present)St-athan (26km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 December, 202447mph WAverage 2021–20267.7mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average March27.5%15%2.5%CalmNear GaleMarch Wind RoseMarch (5 Year Average)5 Year Average Annual5 Year Average March35%18.75%2.5%CalmNear GaleGet WillyWeather+ to remove ads