Portsmouth Harbour - Whale Island Wind ForecastUnited KingdomSEHampshirePortsmouth Harbour - Whale Island1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Portsmouth Harbour - Whale Island wind forecast issued today at 1:11 am. Next forecast at approx. 1:11 pm.Portsmouth Harbour - Whale Island Wind Statistics May WindThorney Island (12km)2025AprilMayStrongest 27 May, 202526.8mph WSWAverage May8.4mphStrongest 15 April, 202531.3mph SAverage April7.6mphStrongest 1 January, 202535.8mph SWAverage 20257.7mphClimate (2011–Present)Thorney Island (12km)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 18 February, 202249.2mph WSWAverage 2020–20258.5mphWind RoseAnnual (5 Year Average)5 Year Average Annual5 Year Average May15%8.75%2.5%CalmGaleMay Wind RoseMay (5 Year Average)5 Year Average Annual5 Year Average May15%8.75%2.5%CalmGaleGet WillyWeather+ to remove ads