Koh San Chalarm
Diving enthusiasts can expect to encounter a diverse array of marine life at this location. Keep an eye out for barracudas, razor fish, scorpionfish, butterfly fish, nudibranchs, hard coral, macros, and schooling fishes. These captivating creatures add to the allure of diving in this region.
With a visibility of approximately 9 meters and a maximum depth of 18 meters, this dive site is accessible to both beginner and advanced divers. It offers a wonderful opportunity to explore the underwater wonders of the Gulf of Thailand.
Diving Conditions Score for Koh San Chalarm
Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Koh San Chalarm
Depth
18m
Visibility
9m
Experience Level
Weather Conditions for Koh San Chalarm
Wave Height
0.5m
Wind Speed
17.8 m/s
Water Temp
30.7°C
Visibility
38.54km
Cloud Cover
22%
Wave Period
3s
Air Temperature
30.1°C
Precipitation
0 mm
Dive Score Chart for Koh San Chalarm
Best time to dive: 10:00 with score 7.687614427860696/10. Water conditions: Waves 0.38m, Wind 14.3 m/s.Best night dive time: 3:00 with score 6.978033333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Koh San Chalarm 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: 7.7/10
Waves: 0.38m (3.35s), Wind: 14.3 m/s
Score: 7.0/10
Waves: 0.52m, Wind: 20.1 m/s
Seasonal Analysis for Koh San ChalarmAlpha
Historical patterns and best seasons for diving at Koh San Chalarm
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 San Chalarm
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Koh San Chalarm
Ideal Conditions for Koh San Chalarm
Water Temp
27.2°C / 81.0°F
August
Visibility
11.9m / 39.0ft
January
Wave Height
1.7m / 5.6ft
January
Wave Period
8.0s
January
Seasonal Insights for Koh San Chalarm
Koh San Chalarm shows typical northern hemisphere patterns with June being the warmest month (28.9°C) and December the coldest (22.8°C). The calmest conditions typically occur in January with average wave heights of 1.7m 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 23, 2026