Southampton Water - River Test Entrance Rainfall ForecastUnited KingdomSEHampshireSouthampton Water - River Test EntranceToday 11 AugNo RainWed 12 AugNo RainThu 13 AugNo RainFri 14 Aug5%Sat 15 Aug5%Sun 16 Aug10%Mon 17 Aug10%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Southampton Water - River Test Entrance rainfall forecast issued today at 1:09 pm. Next forecast at approx. 3:09 am. Rainfall Rainfall AccumulationDean Hill (Wiltshire) RadarGet WillyWeather+ to remove ads