Old Portsmouth Beach Rainfall ForecastUnited KingdomSEHampshireOld Portsmouth BeachToday 29 May15%Fri 30 May10%Sat 31 May15%Sun 1 Jun5%Mon 2 Jun10%Tue 3 Jun15%Old Portsmouth Beach rainfall forecast issued today at 1:37 am. Next forecast at approx. 3:37 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Dean Hill (Wiltshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads