Sitting almost precisely on the equator in the central Pacific, the reefs around Kiribati's outer atolls offer something increasingly rare: coral that hasn't been loved to death. I've dived spots where the staghorn and table corals grow so densely they look planted, and the water carries that particular stillness you only find somewhere genuinely remote.
Visibility regularly exceeds 30 metres, and depths on the outer reef walls drop sharply from the surface shallows to well beyond recreational limits — most of the interesting action happens between 8 and 25 metres.
The marine life is the obvious drawcard. Grey reef sharks patrol the drop-offs in numbers that would make a reef in Southeast Asia feel embarrassed, and you'll encounter whitetip reef sharks resting on sandy patches with routine frequency. Schools of humphead parrotfish, giant trevally, and the occasional hammerhead on deeper passes round out what feels like a genuinely functional reef ecosystem.
Snorkellers working the lagoon shallows will find healthy coral gardens and reasonable fish density without needing a tank.
Getting here is where the romance fades slightly. Kiribati's international connections run through Tarawa, and onward access to the outer islands and reefs depends heavily on liveaboard scheduling. There are no resort-based dive operations of note at the more remote sites — liveaboard is effectively your only realistic option, with a handful of vessels running itineraries through the Phoenix Islands Protected Area and surrounding waters.
Expect limited departure dates and book well ahead.
The reef condition, when I last visited, showed minimal bleaching compared to more trafficked Pacific destinations, though warming events have touched even here — don't assume untouched means invulnerable.
Aim for November to April; open-water certification is sufficient for most sites, but comfort in mild currents is essential.