Southampton Water - River Itchen Entrance Rainfall ForecastUnited KingdomSEHampshireSouthampton Water - River Itchen EntranceToday 19 Sep10%Sat 20 Sep70%Sun 21 Sep10%Mon 22 Sep10%Tue 23 Sep5%Wed 24 Sep15%Southampton Water - River Itchen Entrance rainfall forecast issued yesterday at 7:38 pm. Next forecast at approx. 9:38 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