Helliar Holm Rainfall ForecastUnited KingdomOSOrkney IslandsHelliar HolmToday 18 Jun5%Sat 19 Jun5%Sun 20 Jun10%Mon 21 Jun15%Tue 22 Jun10%Wed 23 Jun10%Helliar Holm rainfall forecast issued today at 12:21 am. Next forecast at approx. 2:21 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time National RadarNational SatelliteNational SynopticGet an account to remove ads