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Chinese Wall, Koh Similan in Thailand

The Chinese Wall dive site, located at the south tip of island 4 in Thailand's Phang-nga Province, is named for its impressive rock wall that stretches far out into the Andaman Sea. Divers of all levels, from beginners to advanced, can explore this site, which offers a maximum depth of 18m and visibility of 18m.

While diving at Chinese Wall, it's important to be cautious of possible currents, particularly at greater depths. However, in the shallow area, you'll find shelter between the rocks, allowing you to enjoy the dive without being affected by the current.

The diverse marine life of the Andaman Sea awaits you at Chinese Wall. Although larger species such as rays and sharks can be encountered at deeper depths, the focus here is on the smaller marine creatures. So keep your eyes peeled for unique and fascinating underwater species.

Whether you're a seasoned diver or just starting out, Chinese Wall offers an exciting diving experience with its beautiful rock formation and abundance of marine life. Make sure to include this magnificent dive site in your itinerary when visiting Thailand's Hideaway.

Diving Conditions Score for Chinese Wall, Koh Similan in Thailand

6.1
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Chinese Wall, Koh Similan in Thailand

Depth

18m

Visibility

18m

Experience Level

beginner
advanced

Weather Conditions for Chinese Wall, Koh Similan in Thailand

Wave Height

1.44m

Wind Speed

31.3 m/s

Water Temp

29.4°C

Visibility

13.54km

Cloud Cover

47%

Wave Period

5.7s

Air Temperature

29.2°C

Precipitation

0.1 mm

Detailed 7-Day Diving Forecast for Chinese Wall
Alpha

Dive Score Chart for Chinese Wall

Best time to dive: 16:00 with score 6.2634333333333325/10. Water conditions: Waves 1.44m, Wind 28.7 m/s.Best night dive time: 18:00 with score 5.764333333333333/10.

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

Sunrise at Chinese Wall: 06:00
Sunset at Chinese Wall: 18:00

Optimal diving conditions at Chinese Wall 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
16:00

Score: 6.3/10
Waves: 1.44m (6.2s), Wind: 28.7 m/s

🌞
Safest Overall
15:00

Score: 6.2/10
Waves: 1.44m (6.2s), Wind: 30.2 m/s

🌙
Best Night
18:00

Score: 5.8/10
Waves: 1.44m, Wind: 27.7 m/s

Seasonal Analysis for Chinese Wall, Koh Similan in Thailand
Alpha

Historical patterns and best seasons for diving at Chinese Wall, Koh Similan 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 Chinese Wall, Koh Similan 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 Chinese Wall, Koh Similan in Thailand

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

Ideal Conditions for Chinese Wall, Koh Similan in Thailand

Water Temp

Thermometer Emoji

27.0°C / 80.6°F

August

Visibility

Telescope Emoji

11.0m / 36.1ft

January

Wave Height

Wave Emoji

1.6m / 5.2ft

April

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Chinese Wall, Koh Similan in Thailand

Chinese Wall, Koh Similan in Thailand shows typical northern hemisphere patterns with May being the warmest month (28.1°C) and December the coldest (23.1°C). The calmest conditions typically occur in April with average wave heights of 1.6m and wave periods of 8.0s. The most comfortable wave conditions are in April 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 April to June, 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 - Jul 8, 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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