Florida's geography is defined by water. The peninsula's 1,350-mile coastline—the second longest in the U.S.—touches three major marine systems: the Atlantic Ocean on the east, Gulf of Mexico on the west, and the Straits of Florida connecting them southward. This marine embrace creates extraordinary ecological diversity and economic opportunity.
Major bays and estuaries punctuate both coasts: Biscayne Bay, Tampa Bay (Florida's largest open-water estuary), Charlotte Harbor, Pensacola Bay, and Apalachicola Bay. The Florida Keys arc southwestward, separating the Atlantic from the Gulf and sheltering Florida Bay's shallow, seagrass-rich waters. Inland, the state boasts over 1,700 rivers and streams.
Key rivers include the north-flowing St. Johns (Florida's longest at 310 miles), the spring-fed Suwannee and Ichetucknee, the Apalachicola (critical for Gulf fisheries), and the Kissimmee (undergoing massive restoration). The Caloosahatchee and St. Lucie connect Lake Okeechobee to both coasts, playing central roles in Everglades hydrology and water management controversies.
This hydrological wealth supports world-class fisheries, tourism, agriculture, and shipping. Yet it also creates vulnerability: sea-level rise, saltwater intrusion, nutrient pollution, and hurricane storm surges threaten the very waters that make Florida unique. Comprehensive Everglades Restoration and basin management plans attempt to balance human needs with ecological sustainability in America's wettest state.