Portsmouth Harbour - M275 Motorway Bridge UV IndexUnited KingdomSEHampshirePortsmouth Harbour - M275 Motorway Bridge1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAPortsmouth Harbour - M275 Motorway Bridge UV forecast issued yesterday at 6:52 pm. Next forecast at approx. 6:52 pm.Get WillyWeather+ to remove ads