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 7:18 am. Next forecast at approx. 7:18 pm.Portland Harbour Wind Statistics August WindIsle Of Portland (3.7 miles)2022JulyAugustStrongest 2 August, 202220.1mph WSWAverage August8.7mphStrongest 24 July, 202226.8mph SWAverage July10.1mphStrongest 18 February, 202262.6mph WSWAverage 202212.4mphClimate (2011–Present)Isle Of Portland (3.7 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202262.6mph WSWAverage 2011–Present13.6mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average August20%11.25%2.5%CalmGaleAugust Wind RoseAugust (5 Year Average)5 Year Average Annual5 Year Average August22.5%12.5%2.5%CalmGaleGet an account to remove ads