Portland Harbour Wind ForecastAustraliaVICWestern DistrictPortland Harbour1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Bureau of Meteorology Swell Height and Direction Forecast NOAA WaveWatch IIIWind Real-Time Portland Harbour wind forecast issued today at 9:34 am. Next forecast at approx. 9:34 pm. Portland Harbour Wind Statistics View MoreSeptember WindCape Nelson Lighthouse (11km)2025AugustSeptemberStrongest 7 September, 202588.9km/h NNEAverage September25km/hStrongest 29 August, 2025116.6km/h SSWAverage August20.9km/hStrongest 29 August, 2025116.6km/h SSWAverage 202521km/hClimate (2010–Present)Cape Nelson Lighthouse (11km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 29 August, 2025116.6km/h SSWAverage 2020–202521.4km/hWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September15%8.75%2.5%CalmGaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September17.5%10%2.5%CalmGaleGet WillyWeather+ to remove ads