Portsmouth Rainfall ForecastUnited KingdomSEHampshirePortsmouthToday 8 Jan100%Fri 9 Jan75%Sat 10 Jan10%Sun 11 Jan90%Mon 12 Jan75%Tue 13 Jan75%Wed 14 Jan15%Portsmouth rainfall forecast issued today at 12:37 pm. Next forecast at approx. 2:37 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