Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Visibility at The Dome is an impressive 17 meters, offering clear views of the diverse marine life below. However, it's important to note that the current can vary in strength depending on the prevailing conditions, making this dive site most suitable for advanced divers.
Divers at The Dome can encounter an abundance of large predatory fish. Blue and white trevally, bluefin tuna, barracudas, manta rays, and whale sharks are just some of the awe-inspiring species that can be observed. The middle layer of the reef is teeming with yellowbacks, yellow dashes, blue dashes, and other fusiliers, creating a vibrant underwater spectacle.
Experience the dance of nature as dawn and dusk reveal a mesmerizing sight - schools of small fish being pursued by bluefin trevally, accompanied by a thrilling tornado of 1,000 blackfin barracuda. Additionally, lucky divers might also catch a glimpse of majestic manta rays and graceful whale sharks.
Venturing to the second pinnacle on the north side of the main reef presents another breathtaking scene akin to a colorful field of flowers, adorned with clusters of soft corals. However, it's essential to exercise caution as the current here can be swift.
Maximizing your diving experience at The Dome requires adequate preparation and a suitable level of expertise. With its remarkable underwater beauty and diverse marine life, this hidden gem in Thailand promises to leave divers in awe.
Diving Conditions Score for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Depth
23m
Visibility
17m
Experience Level
Weather Conditions for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Wave Height
0.82m
Wind Speed
13.8 m/s
Water Temp
30.4°C
Visibility
36.08km
Cloud Cover
98%
Wave Period
9.2s
Air Temperature
28.7°C
Precipitation
0.4 mm
Dive Score Chart for Koh Tachai Pinnacle/The Dome
Best time to dive: 14:00 with score 7.9656596491228076/10. Water conditions: Waves 0.84m, Wind 8.3 m/s.Best night dive time: 3:00 with score 7.628637837837838/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Koh Tachai Pinnacle/The Dome 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: 8.0/10
Waves: 0.84m (9.5s), Wind: 8.3 m/s
Score: 7.6/10
Waves: 0.78m, Wind: 6.4 m/s
Seasonal Analysis for Koh Tachai Pinnacle/The Dome, Koh Surin in ThailandAlpha
Historical patterns and best seasons for diving at Koh Tachai Pinnacle/The Dome, 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 Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Ideal Conditions for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Water Temp
27.0°C / 80.6°F
August
Visibility
10.5m / 34.4ft
January
Wave Height
1.5m / 4.9ft
March
Wave Period
8.0s
January
Seasonal Insights for Koh Tachai Pinnacle/The Dome, Koh Surin in Thailand
Koh Tachai Pinnacle/The Dome, 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 21, 2026