Southampton Water - River Itchen Entrance Rainfall ForecastUnited KingdomSEHampshireSouthampton Water - River Itchen EntranceToday 29 Mar90%Sat 30 Mar5%Sun 31 Mar20%Mon 1 Apr50%Tue 2 Apr75%Wed 3 Apr55%Thu 4 Apr20%Southampton Water - River Itchen Entrance rainfall forecast issued today at 12:43 pm. Next forecast at approx. 2:43 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 an account to remove ads