Portsmouth Harbour - Portsmouth Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - PortsmouthToday 19 Aug95%Thu 20 Aug70%Fri 21 Aug35%Sat 22 Aug5%Sun 23 Aug5%Mon 24 Aug10%Tue 25 Aug10%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Portsmouth Harbour - Portsmouth rainfall forecast issued today at 1:08 pm. Next forecast at approx. 3:08 am. Rainfall Rainfall AccumulationDean Hill (Wiltshire) RadarGet WillyWeather+ to remove ads