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HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

Discover an exhilarating dive spot nestled just off the bay mouth. This newly sunk wreck, measuring 44.9M in length and 7M in width, was once a high-speed attack ship belonging to the esteemed Gulf Patrol Fleet and Royal Thai Navy. Constructed by the renowned Singapore Ship Building and Engineering Co., Ltd.

Immerse yourself in approximately 23m of crystal-clear water, a mere 60m north of Laem Thian. The ship's mast reaches a depth of approximately 13m. This impressive wreck shares the same ship class as the HTMS Suphairin 313, which rests peacefully in the enchanting No Name Bay.

Delight in the intricate details of this sunken vessel, featuring a formidable 20mm anti-aircraft cannon at the bow and a reliable 50-caliber machine gun at the stern. For those with proper training and experience, the wreck has been carefully scuttled to allow for safe penetration.

With a visibility of 14m and a maximum depth of 21m, this dive site promises an unforgettable adventure for both beginner and advanced divers. Located in the breathtaking Surat Thani Province, Thailand, the site is conveniently close to Sathicq's Abandoned Hotel, The Place Hill, Baan Haad Sai Ree, Surat Thani Province, 84360, Thailand.

Embark on a thrilling underwater exploration at this remarkable dive site and create memories that will last a lifetime. Whether you seek adrenaline-fueled dives or serene underwater vistas, this destination has something special to offer divers of all levels.

Diving Conditions Score for HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

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 Hanhak Sattru 312, Wreck, Koh Tao in Thailand

Depth

21m

Visibility

14m

Experience Level

beginner
advanced

Weather Conditions for HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

Wave Height

0.24m

Wind Speed

16.7 m/s

Water Temp

30.7°C

Visibility

31.18km

Cloud Cover

100%

Wave Period

2.25s

Air Temperature

28.9°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for HTMS Hanhak Sattru 312, Wreck
Alpha

Dive Score Chart for HTMS Hanhak Sattru 312, Wreck

Best time to dive: 9:00 with score 8.675942424242425/10. Water conditions: Waves 0.08m, Wind 5.1 m/s.Best night dive time: 5:00 with score 7.645880952380952/10.

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

Sunrise at HTMS Hanhak Sattru 312, Wreck: 06:00
Sunset at HTMS Hanhak Sattru 312, Wreck: 18:00

Optimal diving conditions at HTMS Hanhak Sattru 312, 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
9:00

Score: 8.7/10
Waves: 0.08m (2.2s), Wind: 5.1 m/s

🌙
Best Night
5:00

Score: 7.6/10
Waves: 0.12m, Wind: 9.9 m/s

Seasonal Analysis for HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand
Alpha

Historical patterns and best seasons for diving at HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

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 Hanhak Sattru 312, Wreck, Koh Tao in Thailand

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 Hanhak Sattru 312, Wreck, Koh Tao in Thailand

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

Ideal Conditions for HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

Water Temp

Thermometer Emoji

27.2°C / 81.0°F

August

Visibility

Telescope Emoji

11.5m / 37.7ft

March

Wave Height

Wave Emoji

1.6m / 5.2ft

March

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand

HTMS Hanhak Sattru 312, Wreck, Koh Tao in Thailand shows typical northern hemisphere patterns with June being the warmest month (28.4°C) and December the coldest (23.0°C). The calmest conditions typically occur in March with average wave heights of 1.6m 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 17, 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.

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