Portsmouth Harbour - M275 Motorway Bridge Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - M275 Motorway BridgeToday 24 Aug5%Sun 25 AugNo RainMon 26 AugNo RainTue 27 Aug5%Wed 28 Aug10%Portsmouth Harbour - M275 Motorway Bridge rainfall forecast issued today at 6:31 pm. Next forecast at approx. 6:45 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time National RadarNational SatelliteNational SynopticGet an account to remove ads