Swan River - Heirisson Island Wind ForecastAustraliaWAPerthSwan River - Heirisson Island1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Bureau of MeteorologyWind Real-Time Swan River - Heirisson Island wind forecast issued today at 4:34 am. Next forecast at approx. 4:34 pm. Swan River - Heirisson Island Wind Statistics View MoreDecember WindPerth Metro (5km)2025NovemberDecemberStrongest 14 December, 202559.4km/h SEAverage December12km/hStrongest 23 November, 202551.8km/h SWAverage November11.9km/hStrongest 20 July, 202564.8km/h WAverage 20258.9km/hClimate (2010–Present)Perth Metro (5km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 29 May, 202479.6km/h SSWAverage 2020–20259.1km/hWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December22.5%12.5%2.5%CalmModerateDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December17.5%10%2.5%CalmModerateGet WillyWeather+ to remove ads