Sail Rock

Satun, Adang-rawi Archipelago, Batong Island, Southern Thailand, Thailand20 m maxintermediate

Conditions & tides

Sail RockBatong Island

Fair · 4/5

conditions visualisation

Fair4/5

Some chop right now — best window today 1 PM–5 PM.

Wind18 kn ENE

Current~0.8 kn NW · model

Swell

0.1 m · 3s · NNE

Water

31 °C

Max depth

20 m

Conditions through the day

6 AM6 PM

Calmest current near slack — 16:45 & 05:15 local

Sunrise 06:11 · Sunset 18:02 local

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Tide · local

Outlook — select a day for full conditions

On-face swell 0.0 m — the component of the swell aimed at this site’s exposed face. Current is a regional model value (Copernicus, ~9 km grid) — a guide to the area, not a precise reef measurement. Imagery © Esri · not depth or visibility.

Scored by DiveConnect's site-physics model

Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.

Dived here today? How were conditions vs. what we showed?

About this site

Sail Rock is a granite rock pinnacle located in the Gulf of Thailand, roughly midway between Koh Tao and Koh Phangan. The site is widely regarded as the Gulf's most prominent dive destination and is reached by boat, with the crossing taking around 90 minutes from Koh Tao.

The pinnacle rises steeply from depth and is straightforward to navigate — divers typically circle the spire and ascend gradually. Its signature feature is a vertical swim-through known as the chimney, with a small entrance at around 18 m and an exit at approximately 5 m. Maximum depth at the site is 18 m.

Marine life around the pinnacle is varied and often abundant. Schools of fusiliers, snappers, barracuda, and batfish swirl around the spire, while giant trevally patrol the water column. Napoleon wrasse, sweetlips, white-tip sharks, hawksbill turtles, cuttlefish, octopus, anthias, damselfish, and butterflyfish are also present. Whale sharks are regularly spotted here, with the green season offering the strongest chances of an encounter.

Read the full guide

Conditions at Sail Rock include strong currents, and dives are best timed around slack tide. Visibility is generally excellent. Water temperature ranges between 22–29°C depending on season, and the site is diveable across much of the year, with March through September cited for the best visibility. The swim-through and current make this a site suited to divers with some experience rather than absolute beginners.

AI-written site guide