Every country, and the places worth the trip 26,398 places across 240 countries Guess the country
Meridiela.

Ulithi Atoll

One of the largest atolls in the world, northeast of Yap, with turtle nesting islets.

Updated 20 October 2026

Typeatoll
WhereYap
Nearest cityColonia
Best seasonDecember to April
Time to allowOvernight or longer
Getting thereNortheast of Yap; small plane or field trip ship, both irregular
EntryCommunity fees; visits by arrangement

Ulithi is one of the largest atolls in the world by lagoon area, a ring of around forty islets northeast of Yap enclosing water big enough that a fleet anchored in it during the Second World War. A few hundred people live on four of the islets. Green turtles nest on the uninhabited ones and a community conservation programme monitors them. Custom rules on dress and behaviour are strict.

History

The Portuguese navigator Diogo da Rocha is credited as the first European to find Ulithi, in 1525, and the Spaniard Álvaro de Saavedra arrived on 1 January 1528 and named the atoll the Islands of the Kings, after the coming feast of Epiphany; later Spanish charts called it the Chickpea Islands. Bernardo de Egoy explored it in detail in 1712, and in 1889 a strong earthquake struck Yap and Ulithi (Wikipedia, Ulithi).

What you'll find

  • The lagoon - one of the largest enclosed waters of any atoll.
  • The islet ring - around forty motus around the rim.
  • The turtle nesting - green turtles on the uninhabited islets, monitored locally.
  • The community - a few hundred people on four of the islands.

When to go

December to April is the drier season. Flights and field trip ships are irregular and shift without notice. Turtle nesting peaks in the middle of the year.

Things to know

Access is by irregular small plane or ship and being stranded is normal. Yapese outer island custom on dress and behaviour is strict and non-negotiable. There is no accommodation beyond community arrangements.

Nearby

Yap is southwest, and Fais is east.

Key facts

Area4.5 km² (1.7 sq mi)
Location9.9700° N, 139.6700° E · map

Source: Wikidata, item Q1350219, read on 18 October 2026.

What to pack for Ulithi Atoll

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
  • Binoculars - The single best wildlife tool - even a compact pair transforms a sighting. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon

Some links on this page are Amazon affiliate links - if you buy through them we may earn a small commission at no extra cost to you.

All packing kits

Plan your trip

Where to start if Ulithi Atoll is going on the list.

Booking links on this page are affiliate links - if you book through them we may earn a small commission at no extra cost to you. It never changes what we write about a place.

Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

← More nature & outdoors in Micronesia

One place a week.

A short Friday email about one place worth knowing.