St Marys (Scapa Flow) Rainfall ForecastUnited KingdomOSOrkney IslandsSt Marys (Scapa Flow)Today 5 Mar10%Sat 6 Mar10%Sun 7 Mar80%Mon 8 Mar15%Tue 9 Mar15%St Marys (Scapa Flow) rainfall forecast issued today at 7:31 pm. Next forecast at approx. 9:31 am.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