North Ridge, Koh Bon, Koh Similan in Thailand
Prepare to encounter an awe-inspiring array of marine life, including majestic mantas, intriguing reef sharks, vibrant snappers, graceful foot soles, magnificent Napoleons, fascinating dragon heads, elusive octopus, sleek sea snakes, mesmerizing lionfish, and powerful barracuda.
Exercise caution near the ridge, as strong currents may carry you into the vastness of the blue water. For an unparalleled manta ray encounter, Koh Bon stands as the ultimate spot within the area. However, keep your eyes open, as additional ray sightings are also possible.
With a visibility up to 19 meters and a maximum depth of 24 meters, this enchanting dive site guarantees an unforgettable underwater adventure for both beginner and advanced divers. Whether you're embarking on your first dive or seeking new thrills, this dive site in Thailand promises nothing short of extraordinary.
Diving Conditions Score for North Ridge, Koh Bon, Koh Similan in Thailand
Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for North Ridge, Koh Bon, Koh Similan in Thailand
Depth
24m
Visibility
19m
Experience Level
Weather Conditions for North Ridge, Koh Bon, Koh Similan in Thailand
Wave Height
0.56m
Wind Speed
11.6 m/s
Water Temp
30°C
Visibility
29.64km
Cloud Cover
96%
Wave Period
8.75s
Air Temperature
28.8°C
Precipitation
0.2 mm
Dive Score Chart for North Ridge, Koh Bon
Best time to dive: 14:00 with score 8.717415873015874/10. Water conditions: Waves 0.58m, Wind 7.2 m/s.Best night dive time: 19:00 with score 8.080928571428572/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at North Ridge, Koh Bon 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: 8.7/10
Waves: 0.58m (8.4s), Wind: 7.2 m/s
Score: 8.1/10
Waves: 0.58m, Wind: 9.1 m/s
Seasonal Analysis for North Ridge, Koh Bon, Koh Similan in ThailandAlpha
Historical patterns and best seasons for diving at North Ridge, Koh Bon, 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 North Ridge, Koh Bon, Koh Similan in Thailand
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for North Ridge, Koh Bon, Koh Similan in Thailand
Ideal Conditions for North Ridge, Koh Bon, Koh Similan 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 North Ridge, Koh Bon, Koh Similan in Thailand
North Ridge, Koh Bon, Koh Similan 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 21, 2026