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 12:14 pm. Next forecast at approx. 12:14 am.Portsmouth Harbour - Portchester Lake Wind Statistics February WindThorney Island (13km)2026JanuaryFebruaryStrongest 2 February, 202615.7mph ESEAverage February8.2mphStrongest 11 January, 202631.3mph SSWAverage January9.7mphStrongest 11 January, 202631.3mph SSWAverage 20269.6mphClimate (2011–Present)Thorney Island (13km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202249.2mph WSWAverage 2021–20268.5mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average February15%8.75%2.5%CalmGaleFebruary Wind RoseFebruary (5 Year Average)5 Year Average Annual5 Year Average February12.5%7.5%2.5%CalmGaleGet WillyWeather+ to remove ads