Lake Tiroto
Atiu's lake, sitting between the volcanic centre and the raised coral ring.
Updated 3 September 2026
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
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
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.



