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