Portnahaven Rainfall ForecastUnited KingdomSTArgyll and ButePortnahavenToday 29 Apr95%Tue 30 Apr55%Wed 1 May10%Thu 2 May5%Fri 3 May35%Sat 4 May5%Portnahaven rainfall forecast issued today at 7:38 am. Next forecast at approx. 9:38 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Castor Bay (Lurgan) RadarNational SatelliteNational SynopticGet an account to remove ads