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North Ridge, Koh Bon, Koh Similan in Thailand

Discover a breathtaking dive site nestled in the crystal-clear waters of Phang-nga Province, Thailand. Immerse yourself in the stunning underwater landscape featuring a gentle sloping reef, ideal for divers of all skill levels. From the North Ridge to the West Ridge, prepare to be captivated as you explore this remarkable bay. The currents, typically mild to moderate, provide a comfortable diving experience.

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

7.6
Good

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

beginner
advanced

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

Detailed 7-Day Diving Forecast for North Ridge, Koh Bon
Alpha

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.

Sunrise at North Ridge, Koh Bon: 06:00
Sunset at North Ridge, Koh Bon: 18:00

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.

🌞
Best Overall
14:00

Score: 8.7/10
Waves: 0.58m (8.4s), Wind: 7.2 m/s

🌙
Best Night
19:00

Score: 8.1/10
Waves: 0.58m, Wind: 9.1 m/s

Seasonal Analysis for North Ridge, Koh Bon, Koh Similan in Thailand
Alpha

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

Avg. Score: 10.0/10

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

January
Score: 10.0
February
Score: 10.0
March
Score: 10.0

Ideal Conditions for North Ridge, Koh Bon, Koh Similan in Thailand

Water Temp

Thermometer Emoji

20.9°C / 69.6°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

May

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

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.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 21, 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 North Ridge, Koh Bon is Koh Similan

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Koh Similan

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