Portsmouth Harbour - M275 Motorway Bridge Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - M275 Motorway BridgeToday 19 Jul90%Sun 20 Jul65%Mon 21 Jul65%Tue 22 Jul40%Wed 23 Jul60%Thu 24 Jul35%Portsmouth Harbour - M275 Motorway Bridge rainfall forecast issued yesterday at 7:37 pm. Next forecast at approx. 9:37 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