Chesapeake Bay - Patuxent River Entrance UV IndexUnited StatesMDSt Marys CountyChesapeake Bay - Patuxent River Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAChesapeake Bay - Patuxent River Entrance UV forecast issued today at 3:17 pm. Next forecast at approx. 3:17 pm.Get WillyWeather+ to remove ads