Castletown Wind ForecastUnited KingdomSWDorsetCastletown1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Castletown wind forecast issued today at 1:11 pm. Next forecast at approx. 1:11 am.Castletown Wind Statistics September WindIsle Of Portland (5km)2025AugustSeptemberStrongest 3 September, 202533.6mph SWAverage September21.8mphStrongest 4 August, 202529.1mph WSWAverage August12.6mphStrongest 1 January, 202544.7mph SWAverage 202512.4mphClimate (2011–Present)Isle Of Portland (5km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202262.6mph WSWAverage 2020–202513.7mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September20%11.25%2.5%CalmGaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September17.5%10%2.5%CalmGaleGet WillyWeather+ to remove ads