Portsmouth Harbour - M275 Motorway Bridge Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - M275 Motorway BridgeToday 4 Jun60%Thu 5 Jun85%Fri 6 Jun65%Sat 7 Jun65%Sun 8 Jun5%Mon 9 Jun5%Tue 10 Jun10%Portsmouth Harbour - M275 Motorway Bridge rainfall forecast issued today at 7:38 pm. Next forecast at approx. 9:38 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