Lake Mercer Wind ForecastUnited StatesVAFairfax CountyLake Mercer1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Lake Mercer wind forecast issued today at 6:35 pm. Next forecast at approx. 6:35 am. Wind Speed Wind GustLake Mercer Wind Statistics July WindFort Belvoir (4.3 miles)2026JuneJulyStrongest 5 July, 202611.4mph SAverage July5.4mphStrongest 17 June, 202612.8mph SAverage June6.1mphStrongest 7 February, 202620.8mph NWAverage 20266.3mphClimate (2021–2026)Fort Belvoir (4.3 miles)Take a look at our website widgetsAvailable free! Find Out MoreStrongest 6 December, 202125.3mph NWAverage 2021–20266.3mphGet WillyWeather+ to remove ads