Calshot Castle Rainfall ForecastUnited KingdomSEHampshireCalshot CastleToday 17 Oct45%Sat 18 Oct15%Sun 19 Oct85%Mon 20 Oct60%Tue 21 Oct35%Wed 22 Oct50%Calshot Castle rainfall forecast issued today at 7:37 am. Next forecast at approx. 9:37 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