Harnham Hill Wind ForecastUnited KingdomSWWiltshireHarnham Hill1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Harnham Hill wind forecast issued today at 7:11 am. Next forecast at approx. 7:11 pm. Wind Speed Wind GustHarnham Hill Wind Statistics September WindBoscombe Down (12km)2026AugustSeptemberStrongest 2 September, 202617.9mph SSWAverage September7.5mphStrongest 4 August, 202620.1mph SSWAverage August7.1mphStrongest 12 March, 202631.3mph SSWAverage 20268.3mphClimate (2021–2026)Boscombe Down (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202247mph WSWAverage 2021–20268mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September15%8.75%2.5%CalmStrongSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September17.5%10%2.5%CalmStrongGet WillyWeather+ to remove ads