Potomac River - Saint Margaret Island Wind ForecastUnited StatesMDSt Marys CountyPotomac River - Saint Margaret Island1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Potomac River - Saint Margaret Island wind forecast issued today at 8:30 pm. Next forecast at approx. 8:30 am.Get WillyWeather+ to remove ads