Ao Yai, Koh Tachai, Koh Surin in Thailand
This underwater paradise is teeming with an astonishing variety of marine life, making it a must-visit destination for divers of all levels. From graceful manta rays to majestic whale sharks, encountering these magnificent creatures is always a possibility at Tachai Pinnacle. Barracuda shoals have made this site their home for countless years, while the presence of batfish adds to the allure of this dive site.
While exploring beneath the cerulean blue waters, divers may also come across sizable schools of big mackerels. Additionally, for those with a keen eye for detail, the opportunity to observe mesmerizing macro life such as nudibranchs and coral crabs awaits. It is advisable to have some diving experience for this particular dive, although it serves as an excellent opportunity for divers to familiarize themselves with drift diving techniques.
With a maximum depth of 21 meters and visibility reaching up to 14 meters, the Tachai Pinnacle offers an optimal setting for underwater exploration. Furthermore, this remarkable dive site is suitable for divers at the beginner level, enabling them to embark on an unforgettable diving adventure in Thailand's pristine waters.
Diving Conditions Score for Ao Yai, Koh Tachai, Koh Surin in Thailand
Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Ao Yai, Koh Tachai, Koh Surin in Thailand
Depth
21m
Visibility
14m
Experience Level
Weather Conditions for Ao Yai, Koh Tachai, Koh Surin in Thailand
Wave Height
0.72m
Wind Speed
15.7 m/s
Water Temp
29.8°C
Visibility
36.78km
Cloud Cover
96%
Wave Period
9.25s
Air Temperature
29.9°C
Precipitation
0 mm
Dive Score Chart for Ao Yai, Koh Tachai
Best time to dive: 10:00 with score 8.102426241134753/10. Water conditions: Waves 0.76m, Wind 7.3 m/s.Best night dive time: 21:00 with score 7.476583033932136/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Ao Yai, Koh Tachai 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: 8.1/10
Waves: 0.76m (9.4s), Wind: 7.3 m/s
Score: 7.5/10
Waves: 0.72m, Wind: 17.8 m/s
Seasonal Analysis for Ao Yai, Koh Tachai, Koh Surin in ThailandAlpha
Historical patterns and best seasons for diving at Ao Yai, Koh Tachai, Koh Surin 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 Ao Yai, Koh Tachai, Koh Surin in Thailand
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Ao Yai, Koh Tachai, Koh Surin in Thailand
Ideal Conditions for Ao Yai, Koh Tachai, Koh Surin in Thailand
Water Temp
26.9°C / 80.4°F
August
Visibility
11.0m / 36.1ft
March
Wave Height
1.5m / 4.9ft
March
Wave Period
8.0s
January
Seasonal Insights for Ao Yai, Koh Tachai, Koh Surin in Thailand
Ao Yai, Koh Tachai, Koh Surin in Thailand shows typical northern hemisphere patterns with May being the warmest month (28.1°C) and December the coldest (23.2°C). The calmest conditions typically occur in March with average wave heights of 1.5m 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 0.1mm 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 14, 2026