Htms Sattakut

Surat Thani, Koh Tao, Southern Thailand, Thailandwreck30 m maxintermediate

Conditions & tides

Htms SattakutKoh Tao

Fair · 4/5

conditions visualisation

Fair4/5

Some chop right now — best window today 7 AM–5 PM.

Wind13 kn E

Current~0.4 kn ESE · model

Swell

0.3 m · 3s · ESE

Water

30 °C

Max depth

30 m

Conditions through the day

6 AM6 PM

Calmest current near slack — 07:45 PM local

Sunrise 06:13 AM · Sunset 05:56 PM 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

HTMS Sattakut is a decommissioned warship intentionally sunk as an artificial reef in the waters of Sairee Bay, off Koh Tao, resting at around 30 metres. The vessel began life as a US Navy troop carrier built to support operations in the Pacific, with Sattakut and her sister ships seeing action at Iwo Jima. After the war, she was transferred to the Royal Thai Navy, where she served for over 60 years before being scuttled at her current site off Hin Pee Wee.

The wreck sits with a maximum depth of 30.3 metres and a shallowest point of around 18 metres, making it a substantial structure to explore. Large fish shelter inside the cabins and conning tower, and anti-aircraft guns are present on both the bow and stern. As with any wreck dive, sharp edges, entanglement risks, limited internal spaces, and reduced visibility inside the hull are real hazards; scorpionfish are known to position themselves near doors and portholes, so careful buoyancy and hand placement are essential.

Marine life on the Sattakut is well established, with large snapper, trout, barracuda, pufferfish, and triggerfish regularly seen around the deck and guns. Groupers and batfish shelter within the structure, while baitfish form swirling clouds around the hull. Moray eels, lionfish, scorpionfish, Jenkins stingrays, and glassfish are also encountered regularly.

Read the full guide

Water temperature ranges from 27–31°C, and the site is diveable across the main seasons running from November through April and March through October, with some overlap depending on conditions. Current is generally light and visibility is good. The site is rated intermediate and suits Advanced Open Water divers or those gaining their first experience of deeper wreck diving.

AI-written site guide