Deep Six, Koh Similan in Thailand
Prepare to be enchanted by the vibrant marine life surrounding this dive site. Schools of Damselfish, Yellowback Fusiliers, and other captivating species gracefully dance around the point, offering a mesmerizing display of underwater beauty. If you dive in the early morning, you may even encounter the majestic whitetip sharks in the deeper areas.
The overlapping boulders at this site form swim-throughs and overhangs, offering divers an opportunity to witness captivating underwater scenes. However, it's essential to exercise caution as there can be strong currents at times. In the crevices of the rocks, you'll discover a multitude of macro-organisms, including red snapper and angelfish. At the pinnacle of the rocks, a powerful spectacle awaits as Fusiliers gracefully attack the blue and white trevally.
This dive site is suitable for divers of all levels, including beginners and advanced divers. With a maximum depth of 24 meters, there's plenty to explore while enjoying the stunning underwater scenery.
Located in Thailand, specifically in the Deep Six area of Phang-nga Province, this dive site offers a unique and unforgettable diving experience. Discover the natural wonders of the Similan Islands and immerse yourself in the vibrant marine ecosystem that awaits beneath the surface. Whether you're a seasoned diver or venturing underwater for the first time, this dive site guarantees an exhilarating adventure that will leave you in awe.
Diving Conditions Score for Deep Six, Koh Similan in Thailand
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Deep Six, Koh Similan in Thailand
Depth
24m
Visibility
20m
Experience Level
Weather Conditions for Deep Six, Koh Similan in Thailand
Wave Height
0.58m
Wind Speed
6.9 m/s
Water Temp
29.8°C
Visibility
22.28km
Cloud Cover
95%
Wave Period
7.75s
Air Temperature
29.6°C
Precipitation
0 mm
Dive Score Chart for Deep Six
Best time to dive: 13:00 with score 9.283949315068494/10. Water conditions: Waves 0.54m, Wind 1.5 m/s.Best night dive time: 23:00 with score 8.771125806451614/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Deep Six 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: 9.3/10
Waves: 0.54m (7.3s), Wind: 1.5 m/s
Score: 8.8/10
Waves: 0.5m, Wind: 2.9 m/s
Seasonal Analysis for Deep Six, Koh Similan in ThailandAlpha
Historical patterns and best seasons for diving at Deep Six, 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 Deep Six, Koh Similan in Thailand
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Deep Six, Koh Similan in Thailand
Ideal Conditions for Deep Six, Koh Similan in Thailand
Water Temp
27.0°C / 80.6°F
August
Visibility
10.8m / 35.4ft
January
Wave Height
1.6m / 5.2ft
March
Wave Period
8.0s
January
Seasonal Insights for Deep Six, Koh Similan in Thailand
Deep Six, 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 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.
Last updated: 1 min. ago - Jun 18, 2026