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 10:34 am. Next forecast at approx. 10:34 pm. Portland Harbour Wind Statistics View MoreDecember WindCape Nelson Lighthouse (11km)2025NovemberDecemberStrongest – Average December28.4km/hStrongest 26 November, 202590.7km/h NWAverage November25.3km/hStrongest 29 August, 2025116.6km/h SSWAverage 202522.2km/hClimate (2010–Present)Cape Nelson Lighthouse (11km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 29 August, 2025116.6km/h SSWAverage 2020–202521.5km/hWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December15%8.75%2.5%CalmGaleDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December15%8.75%2.5%CalmGaleGet WillyWeather+ to remove ads