Southsea Castle Rainfall ForecastUnited KingdomSEHampshireSouthsea CastleToday 31 May5%Sun 1 Jun15%Mon 2 Jun5%Tue 3 Jun60%Wed 4 Jun10%Thu 5 Jun40%Southsea Castle rainfall forecast issued today at 1:37 am. Next forecast at approx. 3:37 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