Grantham Island Wind ForecastAustraliaSAEyre PeninsulaGrantham Island1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Bureau of MeteorologyWind Real-Time Grantham Island wind forecast issued today at 7:04 am. Next forecast at approx. 7:04 pm. Grantham Island Wind Statistics View MoreDecember WindPort Lincoln Airport (19km)2025NovemberDecemberStrongest – Average December–Strongest 16 November, 202572.4km/h WSWAverage November19.5km/hStrongest 7 June, 202587.1km/h WSWAverage 202518.7km/hClimate (2010–Present)Port Lincoln Airport (19km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 July, 2023101.9km/h NWAverage 2020–202518.4km/hWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average December10%6.25%2.5%CalmGaleDecember Wind RoseDecember (5 Year Average)5 Year Average Annual5 Year Average December20%11.25%2.5%CalmGaleGet WillyWeather+ to remove ads