Southampton Rainfall ForecastUnited KingdomSEHampshireSouthamptonToday 18 Dec100%Fri 19 Dec10%Sat 20 Dec40%Sun 21 Dec55%Mon 22 Dec10%Tue 23 Dec10%Wed 24 Dec10%Southampton rainfall forecast issued today at 12:39 pm. Next forecast at approx. 2:39 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