Portsmouth Harbour - Royal Clarence Marina Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - Royal Clarence MarinaToday 15 Nov95%Mon 16 Nov95%Tue 17 Nov65%Wed 18 Nov60%Thu 19 Nov40%Fri 20 Nov30%Sat 21 Nov20%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Portsmouth Harbour - Royal Clarence Marina rainfall forecast issued today at 12:08 pm. Next forecast at approx. 2:08 am. Rainfall Rainfall AccumulationDean Hill (Wiltshire) RadarGet WillyWeather+ to remove ads