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 7:09 am. Next forecast at approx. 7:09 pm.Grass Holm Wind Statistics May WindKirkwall (12km)2026AprilMayStrongest 4 May, 202626.8mph WSWAverage May9.5mphStrongest 5 April, 202640.3mph NAverage April13.3mphStrongest 22 January, 202640.3mph ESEAverage 202615.3mphClimate (2011–Present)Kirkwall (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 22 January, 202453.7mph WAverage 2021–202612.4mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average May20%11.25%2.5%CalmGaleMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May15%8.75%2.5%CalmGaleGet WillyWeather+ to remove ads