Portsmouth Harbour - M275 Motorway Bridge Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - M275 Motorway BridgeToday 7 Jul80%Tue 8 JulNo RainWed 9 JulNo RainThu 10 JulNo RainFri 11 JulNo RainSat 12 JulNo RainPortsmouth Harbour - M275 Motorway Bridge rainfall forecast issued today at 1:36 am. Next forecast at approx. 3:36 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