Portland Wind ForecastUnited KingdomSWDorsetPortland1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Portland wind forecast issued today at 1:09 pm. Next forecast at approx. 1:09 am. Wind Speed Wind GustPortland Wind Statistics September WindIsle Of Portland (5km)2026AugustSeptemberStrongest 4 September, 202633.6mph WSWAverage September13.4mphStrongest 29 August, 202635.8mph WSWAverage August13.3mphStrongest 9 January, 202644.7mph NWAverage 202613.9mphClimate (2021–2026)Isle Of Portland (5km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202262.6mph WSWAverage 2021–202613.9mphWind 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