Calshot Castle Rainfall ForecastUnited KingdomSEHampshireCalshot CastleToday 16 Sep90%Wed 17 Sep80%Thu 18 Sep45%Fri 19 Sep10%Sat 20 Sep40%Sun 21 Sep15%Calshot Castle 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