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

Lake Tiroto

Atiu's lake, sitting between the volcanic centre and the raised coral ring.

Updated 3 September 2026

Typelake
WhereAtiu
Nearest cityAtiu
Best seasonMay to October
Time to allowTwo hours
Getting thereIn the makatea depression on Atiu; road and track access
EntryFree; guide advised

Lake Tiroto lies in the swampy ring between Atiu's volcanic centre and the makatea that surrounds it, the largest body of fresh water in the southern Cook Islands, and eels are caught in it, still a valued food on the island. A cave passage at one end connects the lake through the coral towards the sea, and it can be entered with a guide. Taro is grown in the wet ground around the shore.

Highlights

  • The lake - the largest fresh water in the southern Cook Islands.
  • The cave passage - the connection through the coral towards the sea.
  • The eel fishery - the catch that is still a valued food on the island.
  • The taro ground - the cultivation in the wet ring around the lake.

When to go

May to October is the drier season. Water levels rise through the wet months. Guides work on arrangement.

Good to know

The lake edges are swampy and access is limited. The cave passage needs a guide and gets wet. There is no infrastructure at the shore.

Nearby

Anatakitaki is nearby, and Atiu's villages are inland.

Key facts

Location20.0096° S, 158.1238° W · map

Source: Wikidata, item Q5751373, read on 18 October 2026.

What to pack for Lake Tiroto

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

  • Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
  • Head torch + spare batteries - Hands-free light is essential; caves are truly dark. Find on Amazon
  • Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
  • Grippy closed shoes - Cave floors are wet, muddy and slick with formations. 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 Lake Tiroto 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 Cook Islands

One place a week.

A short Friday email about one place worth knowing.