HTMS Sattakut 742, Wreck, Koh Tao
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
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
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
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.
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.
Score: 8.3/10
Waves: 0.14m (2.25s), Wind: 8.1 m/s
Score: 7.7/10
Waves: 0.08m, Wind: 16.3 m/s
Seasonal Analysis for HTMS Sattakut 742, Wreck, Koh TaoAlpha
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
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
Ideal Conditions for HTMS Sattakut 742, Wreck, Koh Tao
Water Temp
27.2°C / 81.0°F
August
Visibility
11.2m / 36.7ft
March
Wave Height
1.7m / 5.6ft
March
Wave Period
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.
Last updated: 1 min. ago - Jun 19, 2026