Charleston, Oregon is a small coastal town located at the entrance of Coos Bay. The climate in Charleston is mild and temperate, with temperatures averaging around 60°F. Rainfall is common throughout the year, with an average of 100 inches per year. The town is surrounded by water and wetlands, making hydrology an important aspect of the area. The Coos Bay estuary is home to a variety of fish and wildlife, including salmon, steelhead, and harbor seals. Outdoor recreation opportunities in Charleston include fishing, crabbing, clamming, and boating. The town is also home to the South Slough National Estuarine Research Reserve, which offers hiking trails and educational programs.