Portsmouth Harbour - Pewit Island Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - Pewit IslandToday 2 Nov30%Mon 3 Nov45%Tue 4 Nov50%Wed 5 Nov45%Thu 6 Nov10%Fri 7 Nov80%Sat 8 Nov5%Portsmouth Harbour - Pewit Island rainfall forecast issued today at 6:36 pm. Next forecast at approx. 8:36 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