Koh Lanta/Things to do/ water
The Koh Rok and Koh Haa snorkelling trip
The full-day snorkelling run south to Koh Rok and Koh Haa, the clearest water reachable from Lanta in a day. Shut for the monsoon until 1 October.
What we checked, 21 September 2026
Checked on 21 September 2026. Klook carries five Koh Lanta trips and not one of them reaches our bar: the best-reviewed has 17 reviews, the rest have between two and seven, so none is listed here. This one is on Viator, where the product page itself gives 4.5 out of 5 from 166 reviews, which is 9.0 out of 10 and clears the bar on both counts. Viator names the supplier as Trip Store Krabi. No price is published here because Viator quotes in the currency of wherever you happen to be sitting. The closure dates are the department's, not the operator's. We have not done this trip.
Verified via. Koh Rok and Koh Haa both lie inside Mu Ko Lanta National Park, and their closure dates come from the Department of National Parks' 2026 closure announcement of 18 December 2025. The operator below was read on its own Viator product page on 21 September 2026.
Who runs it
Separate companies, listed separately. We do not average scores across operators, because the average would describe a trip you cannot book.
| Operator | Score | Reviews | From |
|---|---|---|---|
| Snorkel Adventure Sea Tour to Koh Rok and Koh Haa from Koh Lantaviator | 4.5/5 (9.0/10) | 166 | varies by package |
These are affiliate links. If you book through one we may earn a commission, at no extra cost to you. It does not affect which operators clear our bar.
Koh Rok is two islands an hour and a half south of Lanta, with a channel of clear shallow water between them, and Koh Haa is a cluster of five limestone islands with a lagoon in the middle of them. Together they are the reason people book a boat from Lanta rather than a taxi to the beach.
It cannot run there at the moment. Both sets of islands sit inside Mu Ko Lanta National Park, and the Department of National Parks closes them for the monsoon: Ko Rok from 1 June to 30 September 2026, and Ko Ha, along with the dive pinnacles Hin Daeng and Hin Muang, from 1 August to 30 September. Boats run again from 1 October. Anyone selling you Koh Rok this month is selling you something else.
The day is long. Seven and a half hours by the operator’s own description, most of it on the water, with snorkelling stops at both island groups. Take more sun protection than you think and something dry for the ride home.
Why this one. Five Koh Lanta trips are listed on Klook and none of them has enough reviews behind it to tell you anything: the busiest has seventeen. On Viator this trip has 166 reviews at 4.5 out of 5, which is why it is the one here. Our ferry guide covers getting to Lanta in the first place, and the seasons that apply to that too.
Best for
The best snorkelling within reach of Lanta, once the islands reopen
Skip if
You are here before October, or a seven-hour day on a boat is not your idea of a holiday
More in Koh Lanta
- Diving from Koh Lanta — water
- Khlong Chak Waterfall — nature
- Lanta Old Town — culture
- Mu Ko Lanta National Park — nature