Grass Holm Wind ForecastUnited KingdomOSOrkney IslandsGrass Holm1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Grass Holm wind forecast issued today at 1:11 am. Next forecast at approx. 1:11 pm.Grass Holm Wind Statistics September WindKirkwall (12km)2024AugustSeptemberStrongest 10 September, 202433.6mph NWAverage September9.1mphStrongest 14 August, 202435.8mph WSWAverage August12.6mphStrongest 22 January, 202453.7mph WAverage 202412.6mphClimate (2011–Present)Kirkwall (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 17 February, 202053.7mph WSWAverage 2019–202412.1mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average September20%11.25%2.5%CalmStrong GaleSeptember Wind RoseSeptember (5 Year Average)5 Year Average Annual5 Year Average September22.5%12.5%2.5%CalmStrong GaleGet WillyWeather+ to remove ads