Dahlgren, Virginia is located on the Potomac River and experiences a humid subtropical climate with hot summers and mild winters. The area's hydrology constituents include the Potomac River and its tributaries, which support a diverse ecosystem of fish and wildlife. Outdoor recreation opportunities in the area include fishing, boating, kayaking, and hiking in nearby parks and wildlife refuges. The Machodoc Creek Marina is a popular spot for boaters, and the Caledon State Park offers hiking trails through wetlands and forests. The area also has several historical sites, including the birthplace of George Washington and the Dahlgren Naval Surface Warfare Center.