Southampton Rainfall ForecastUnited KingdomSEHampshireSouthamptonToday 21 Nov80%Fri 22 Nov90%Sat 23 Nov95%Sun 24 Nov90%Mon 25 Nov35%Tue 26 Nov15%Southampton rainfall forecast issued today at 6:38 am. Next forecast at approx. 8:38 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