The Savannah River carries eighteen-foot tides twice daily — the third-highest tidal range on the Atlantic coast — a hydraulic fact that shaped three centuries of maritime commerce. Cotton bales once crowded the stone wharves at River Street, where packet steamers competed for berthing priority before the railroads arrived in the 1850s. Today the river serves private charter vessels and sightseeing boats that depart from the same cobblestone quay, the evening departure schedule synchronized to slack water between ebb and flood. A private sunset cruise Savannah GA offers access to a littoral ecosystem rare along the southeastern seaboard. Atlantic bottlenose dolphins patrol the shipping channel year-round, hunting mullet schools that concentrate near the Talmadge Bridge pilings. Egrets and herons wade the spartina marshes that buffer the riverbanks, their rookeries nested in dead cypress snags visible from the water. The Savannah National Wildlife Refuge borders the river's upper reaches, a 29,000-acre tidal wetland where wood storks forage during spring migration. Evening light on the Savannah River shifts quickly. The western sky typically transitions from gold to violet within twenty minutes of solar descent, the color gradient reflected in the tannin-stained water. Factor Swamp drains into the river north of the city, carrying dissolved organic matter that tints the current amber-brown even at flood stage. Historic architecture frames the downtown waterfront — the cast-iron colonnades of Factor's Walk, the brick facades of Cotton Exchange warehouses, the copper dome of City Hall — each structure illuminated by gas lamp replicas after dusk. River traffic thins after 19:00, leaving the channel to charter boats and occasional container ships bound for Garden City Terminal. Savannah riverboat sunset tour options range from narrated harbor cruises to private charters with onboard catering. Dolphin watching eco cruises focus on marine biology rather than historical commentary. Dinner cruises combine Low Country cuisine with live acoustic sets, the menu emphasizing Savannah red rice and she-crab soup. Departure frequency increases between April and October when visitor volume peaks.