St Marys (Scapa Flow) UV IndexUnited KingdomOSOrkney IslandsSt Marys (Scapa Flow)1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAASt Marys (Scapa Flow) UV forecast issued today at 7:51 pm. Next forecast at approx. 7:51 pm. UV IndexGet WillyWeather+ to remove ads