Castle Bay Rainfall ForecastUnited KingdomHEWestern IslesCastle BayToday 1 Sep10%Wed 2 Sep80%Thu 3 Sep40%Fri 4 Sep40%Sat 5 Sep55%Sun 6 Sep70%Mon 7 Sep40%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Castle Bay rainfall forecast issued today at 1:08 pm. Next forecast at approx. 3:08 am. Rainfall Rainfall AccumulationDruim a'Starraig (Isle of Lewis) RadarGet WillyWeather+ to remove ads