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HTMS Sattakut 742, Wreck, Koh Tao

This dive site in the Gulf of Thailand is a popular wreck dive location for advanced and expert divers. Situated just off the coast of Himpi Wee near Nang Yuan Island, the submerged Royal Thai Navy warship, HTMS Sattakut, offers a unique diving experience. At a maximum depth of 26 meters, the wreck provides multiple entry and exit points for advanced wreck divers and students.

The bridge of the warship lies at a relatively deep point, approximately 18 meters beneath the water's surface. Here, divers can observe fascinating marine life such as Red Kingfish and Yaito grouper. On the hull of the boat, they can also encounter schools of snapper and terme trevally. Macro divers will be delighted by the variety of shrimps, crabs, nudibranchs, and other marine creatures that can be found by carefully exploring the hull.

Originally commissioned by the US Navy in 1944, the HTMS Sattakut played a significant role during WWII in the Pacific Island Hopping strategy. After the war, the ship was gifted to the Thai Navy and primarily used for training purposes. In 2011, the vessel was decommissioned and later purchased by the people of Koh Tao to serve as an artificial reef. It was scuttled just off Sairee Beach, making it accessible for divers of all levels who possess the necessary certifications.

With a visibility of around 10 meters, this dive site offers a captivating underwater experience. Its historic significance, diverse marine life, and unique wreck structure make it a must-visit destination for divers seeking adventure and exploration. Capture unforgettable moments and share them on Instagram at this remarkable dive site near Koh Tao.

Diving Conditions Score for HTMS Sattakut 742, Wreck, Koh Tao

7.8
Good

Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for HTMS Sattakut 742, Wreck, Koh Tao

Depth

26m

Visibility

10m

Experience Level

advanced
expert

Weather Conditions for HTMS Sattakut 742, Wreck, Koh Tao

Wave Height

0.18m

Wind Speed

19.6 m/s

Water Temp

31.1°C

Visibility

37.62km

Cloud Cover

81%

Wave Period

2.05s

Air Temperature

27.5°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for HTMS Sattakut 742, Wreck
Alpha

Dive Score Chart for HTMS Sattakut 742, Wreck

Best time to dive: 12:00 with score 8.299418518518518/10. Water conditions: Waves 0.14m, Wind 8.1 m/s.Best night dive time: 2:00 with score 7.747009090909091/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at HTMS Sattakut 742, Wreck: 06:00
Sunset at HTMS Sattakut 742, Wreck: 18:00

Optimal diving conditions at HTMS Sattakut 742, Wreck are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.

🌞
Best Overall
12:00

Score: 8.3/10
Waves: 0.14m (2.25s), Wind: 8.1 m/s

🌙
Best Night
2:00

Score: 7.7/10
Waves: 0.08m, Wind: 16.3 m/s

Seasonal Analysis for HTMS Sattakut 742, Wreck, Koh Tao
Alpha

Historical patterns and best seasons for diving at HTMS Sattakut 742, Wreck, Koh Tao

The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.

Monthly Dive Score Analysis - Seasonal Diving Conditions

Higher values indicate better diving conditions

Seasonal DiveScore Chart

This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.

Higher values indicate better diving conditions

Best Season for HTMS Sattakut 742, Wreck, Koh Tao

Winter

Avg. Score: 10.0/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for HTMS Sattakut 742, Wreck, Koh Tao

January
Score: 10.0
February
Score: 10.0
March
Score: 10.0

Ideal Conditions for HTMS Sattakut 742, Wreck, Koh Tao

Water Temp

Thermometer Emoji

27.2°C / 81.0°F

August

Visibility

Telescope Emoji

11.2m / 36.7ft

March

Wave Height

Wave Emoji

1.7m / 5.6ft

March

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for HTMS Sattakut 742, Wreck, Koh Tao

HTMS Sattakut 742, Wreck, Koh Tao shows typical northern hemisphere patterns with June being the warmest month (28.3°C) and December the coldest (23.0°C). The calmest conditions typically occur in March with average wave heights of 1.7m and wave periods of 8.0s. The most comfortable wave conditions are in March with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.2mm of precipitation. For beginners, the best time to visit would be during March to May, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 19, 2026

Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.

The closest dive destination to HTMS Sattakut 742, Wreck is Koh Tao

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