Portsmouth Harbour - Haslar Marina Wind ForecastUnited KingdomSEHampshirePortsmouth Harbour - Haslar Marina1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast Met OfficeWind Real-Time Portsmouth Harbour - Haslar Marina wind forecast issued today at 7:09 am. Next forecast at approx. 7:09 pm.Portsmouth Harbour - Haslar Marina Wind Statistics April WindThorney Island (14km)2026MarchAprilStrongest 5 April, 202633.6mph WAverage April9.4mphStrongest 24 March, 202635.8mph WAverage March8.4mphStrongest 24 March, 202635.8mph WAverage 20269.4mphClimate (2011–Present)Thorney Island (14km)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 April15%8.75%2.5%CalmNear GaleApril Wind RoseApril (5 Year Average)5 Year Average Annual5 Year Average April20%11.25%2.5%CalmNear GaleGet WillyWeather+ to remove ads