Helliar Holm Rainfall ForecastUnited KingdomOSOrkney IslandsHelliar HolmToday 2 Mar5%Wed 3 Mar20%Thu 4 Mar10%Fri 5 Mar10%Sat 6 Mar15%Helliar Holm rainfall forecast issued today at 1:31 am. Next forecast at approx. 3:31 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