Crystal Bay, Koh Phangan in Thailand
Crystal Bay in Thailand is a fantastic destination for beginners and experienced divers alike. This stunning dive site offers a delightful underwater experience with its picturesque granite boulders and vibrant coral reefs. Immerse yourself in crystal-clear waters with a visibility of 17m and explore the depths up to 19m. Encounter a diverse range of marine life, from schools of mesmerizing fish to fascinating creatures like crabs and shrimp. Located near Ko Samui in the Surat Thani Province of Thailand, Crystal Bay is a must-visit for anyone seeking an unforgettable diving adventure.
Diving Conditions Score for Crystal Bay, Koh Phangan in Thailand
7
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Crystal Bay, Koh Phangan in Thailand
Depth
19m
Visibility
17m
Experience Level
beginner
Weather Conditions for Crystal Bay, Koh Phangan in Thailand
Wave Height
0.34m
Wind Speed
10 m/s
Water Temp
31.2°C
Visibility
15km
Cloud Cover
57.5%
Wave Period
2.55s
Air Temperature
20°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Crystal Bay
Alpha
Dive Score Chart for Crystal Bay
Best time to dive: 6:00 with score 8.163333333333334/10. Water conditions: Waves 0.34m, Wind 10 m/s.Best night dive time: 0:00 with score 7.663333333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Crystal Bay: 06:00
Sunset at Crystal Bay: 18:00
Optimal diving conditions at Crystal Bay 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
6:00Score: 8.2/10
Waves: 0.34m (8s), Wind: 10 m/s
Best Night
0:00Score: 7.7/10
Waves: 0.34m, Wind: 10 m/s
Seasonal Analysis for Crystal Bay, Koh Phangan in ThailandAlpha
Historical patterns and best seasons for diving at Crystal Bay, Koh Phangan 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 Crystal Bay, Koh Phangan 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 Crystal Bay, Koh Phangan in Thailand
January
Score: 10.0
February
Score: 10.0
March
Score: 10.0
Ideal Conditions for Crystal Bay, Koh Phangan in Thailand
Water Temp
20.9°C / 69.6°F
June
Visibility
20.1m / 65.9ft
May
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Crystal Bay, Koh Phangan in Thailand
Crystal Bay, Koh Phangan in Thailand shows typical northern hemisphere patterns with June being the warmest month (20.9°C) and December the coldest (16.9°C). The calmest conditions typically occur in January with average wave heights of 0.2m and wave periods of 8.0s. The most comfortable wave conditions are in January 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 0.0mm of precipitation. For beginners, the best time to visit would be during January to March, 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 22, 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.
The closest dive destination to Crystal Bay is Koh Phangan
9 Dive sites near Crystal Bay in Koh Phangan
Find more dive sites in Thailand
Thailand
Got feedback?
Help us improve this dive site by giving us feedback.