Southampton Water - River Test Entrance Rainfall ForecastUnited KingdomSEHampshireSouthampton Water - River Test EntranceToday 3 Dec10%Wed 4 Dec90%Thu 5 Dec75%Fri 6 Dec85%Sat 7 Dec50%Sun 8 Dec10%Mon 9 Dec10%Southampton Water - River Test Entrance rainfall forecast issued today at 12:38 pm. Next forecast at approx. 2:38 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