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 12:13 am. Next forecast at approx. 12:13 pm.Portland Harbour Wind Statistics January WindIsle Of Portland (6km)2025DecemberJanuaryStrongest 1 January, 202544.7mph SWAverage January12.6mphStrongest 7 December, 202455.9mph WNWAverage December17.7mphStrongest 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 January20%11.25%2.5%CalmStrong GaleJanuary Wind RoseJanuary (5 Year Average)5 Year Average Annual5 Year Average January17.5%10%2.5%CalmStrong GaleGet WillyWeather+ to remove ads