Portland Harbour Wind ForecastUnited KingdomSWDorsetPortland Harbour1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Portland Harbour wind forecast issued today at 7:11 am. Next forecast at approx. 7:11 pm. Wind Speed Wind GustPortland Harbour Wind Statistics July WindIsle Of Portland (6km)2026JuneJulyStrongest 2 July, 202626.8mph WAverage July9.5mphStrongest 6 June, 202640.3mph WSWAverage June14.1mphStrongest 9 January, 202644.7mph NWAverage 202614.3mphClimate (2021–2026)Isle Of Portland (6km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202262.6mph WSWAverage 2021–202613.8mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average July20%11.25%2.5%CalmNear GaleJuly Wind RoseJuly (5 Year Average)5 Year Average Annual5 Year Average July30%16.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads