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 1:11 am. Next forecast at approx. 1:11 pm.Portland Harbour Wind Statistics May WindIsle Of Portland (6km)2025AprilMayStrongest 10 May, 202520.1mph EAverage May9.2mphStrongest 16 April, 202544.7mph SWAverage April12.2mphStrongest 1 January, 202544.7mph SWAverage 202512.6mphClimate (2011–Present)Isle Of Portland (6km)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 May20%11.25%2.5%CalmGaleMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May20%11.25%2.5%CalmGaleGet WillyWeather+ to remove ads