Portsmouth Rainfall ForecastUnited KingdomSEHampshirePortsmouthToday 24 Feb15%Wed 25 Feb20%Thu 26 Feb90%Fri 27 Feb40%Sat 28 Feb75%Sun 1 Mar55%Portsmouth rainfall forecast issued yesterday at 6:37 pm. Next forecast at approx. 8:37 am.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