Portsmouth Harbour - Portchester Lake Wind ForecastUnited KingdomSEHampshirePortsmouth Harbour - Portchester Lake1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Portsmouth Harbour - Portchester Lake wind forecast issued today at 6:13 pm. Next forecast at approx. 6:13 am.Portsmouth Harbour - Portchester Lake Wind Statistics November WindThorney Island (13km)2024OctoberNovemberStrongest 19 November, 202424.6mph WAverage November5.4mphStrongest 8 October, 202426.8mph SSWAverage October7.1mphStrongest 2 January, 202442.5mph WAverage 20248.1mphClimate (2011–Present)Thorney Island (13km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 7 March, 202051.4mph SWAverage 2019–20248.8mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average November15%8.75%2.5%CalmNear GaleNovember Wind RoseNovember (5 Year Average)5 Year Average Annual5 Year Average November20%11.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads