Postans Wind ForecastAustraliaWAPerthPostans1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Bureau of MeteorologyWind Real-Time Postans wind forecast issued yesterday at 9:11 pm. Next forecast at approx. 9:23 pm. Postans Wind Statistics View MoreSeptember WindGARDEN ISLAND HSF (11km)2019AugustSeptemberStrongest 1 September, 201976km/h WAverage September21km/hStrongest 16 August, 201985.3km/h SSWAverage August19km/hStrongest 10 June, 201994.3km/h WAverage 201920.7km/hClimate (2010–Present)GARDEN ISLAND HSF (11km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 25 February, 2018129.6km/h WSWAverage 2010–Present21.8km/hWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September17.5%10%2.5%CalmGaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September15%8.75%2.5%CalmGaleGet an account to remove ads