Sebastian Inlet

Best months: Apr–Jun

Protected Area

Sebastian Inlet State Park

Why dive here

With 87+ marine species recorded in the area - including bull sharks, dolphins, hammerhead sharks, seahorses and sea turtles - Sebastian Inlet offers some of Florida Keys's richest reef diving. Water ranges 19-32°C, warmest July, August, September.

Best timeApr–Jun

WetsuitA 3mm shorty or thin full wetsuit

Marine lifeBull Sharks, Dolphins, Hammerhead Sharks, Seahorses and Sea Turtles · 87+ species recorded

Water19-32°C · warmest July, August, September

CharacterReef dive

StandoutRich in charismatic marine life

Sebastian Inlet gets a bad rap sometimes, being so close to shore and feeling a bit like a secret spot for local spearfishers. But we love it for exactly that reason. The current can rip through here, especially on a tide change, but that’s what brings in the action. Think big schools of fantail mullet and snapper pushing against the flow, and where there's bait, there are predators. We've seen great hammerheads cruising the deeper edges, a genuinely heart-stopping moment when a shadow just peels off the blue. It’s not your typical Keys coral garden, more of a rugged rock and channel system with patches of coral and eelgrass swaying. That eelgrass is where we often spot dwarf seahorses clinging on, barely bigger than your thumbnail – a real test of your spotting skills. We'd suggest timing your dive for slack high tide; visibility tends to be best then, and the current less brutal, making it easier to explore without getting swept away. It’s a site that rewards patience and good buoyancy control, perfect for divers who appreciate the hunt for the subtle rather than the immediate flash of colour.