St Marys (Scapa Flow) Rainfall ForecastUnited KingdomOSOrkney IslandsSt Marys (Scapa Flow)Today 17 Jul20%Fri 18 Jul40%Sat 19 Jul25%Sun 20 Jul25%Mon 21 Jul15%Tue 22 Jul15%St Marys (Scapa Flow) rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Hill of Dudwick (Aberdeenshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads