Skip to content
Go to Dive Champ home pageDive Champ LogoDive Champ

The Bay, Koh Bon, Koh Similan in Thailand

Bon Island, located about 50 km west of Khao Lak in the Phang-nga Province of Thailand, is an impressive uplifted limestone island. Situated approximately 20 km north of the Similan Islands, this dive site offers an enticing underwater adventure for divers of all levels.

One notable feature of Bon Island is its long and narrow ridge point on the west side. As you explore the depths, a breathtaking landscape of hard corals adorns the walls, creating a picturesque backdrop for your dive. This underwater paradise is inhabited by a diverse range of marine life, including nudibranches, octopus, morays, and even occasional sightings of manta rays and the majestic whale shark near the bay.

With a visibility of 18m and a maximum depth of 22m, Bon Island is an ideal destination for beginner divers looking to embark on an unforgettable exploration of Thailand's underwater treasures. Whether you are an experienced diver or a novice just starting your underwater journey, this dive site guarantees an immersive experience in the heart of Southeast Asia's marine wonderland.

Plan your dive at Bon Island, Thailand, and immerse yourself in the awe-inspiring beauty of its underwater world.

Diving Conditions Score for The Bay, Koh Bon, Koh Similan in Thailand

7.2
Good

Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for The Bay, Koh Bon, Koh Similan in Thailand

Depth

22m

Visibility

18m

Experience Level

beginner

Weather Conditions for The Bay, Koh Bon, Koh Similan in Thailand

Wave Height

0.64m

Wind Speed

12.5 m/s

Water Temp

30.4°C

Visibility

9.78km

Cloud Cover

96%

Wave Period

7.1s

Air Temperature

27.2°C

Precipitation

0.2 mm

Detailed 7-Day Diving Forecast for The Bay, Koh Bon
Alpha

Dive Score Chart for The Bay, Koh Bon

Best time to dive: 14:00 with score 8.378804219409282/10. Water conditions: Waves 0.6m, Wind 8.6 m/s.Best night dive time: 19:00 with score 7.7720061728395065/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at The Bay, Koh Bon: 06:00
Sunset at The Bay, Koh Bon: 18:00

Optimal diving conditions at The Bay, 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: 8.4/10
Waves: 0.6m (7.9s), Wind: 8.6 m/s

🌞
Safest Overall
6:00

Score: 8.3/10
Waves: 0.62m (7.2s), Wind: 7.3 m/s

🌙
Best Night
19:00

Score: 7.8/10
Waves: 0.6m, Wind: 14 m/s

Seasonal Analysis for The Bay, Koh Bon, Koh Similan in Thailand
Alpha

Historical patterns and best seasons for diving at The Bay, 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 The Bay, 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 The Bay, Koh Bon, Koh Similan in Thailand

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

Ideal Conditions for The Bay, Koh Bon, Koh Similan in Thailand

Water Temp

Thermometer Emoji

27.0°C / 80.6°F

August

Visibility

Telescope Emoji

10.7m / 35.1ft

December

Wave Height

Wave Emoji

1.6m / 5.2ft

March

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for The Bay, Koh Bon, Koh Similan in Thailand

The Bay, Koh Bon, Koh Similan in Thailand shows typical northern hemisphere patterns with May being the warmest month (28.2°C) and December the coldest (23.2°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 0.1mm 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.

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 The Bay, Koh Bon is Koh Similan

Koh SimilanKoh Similan

Koh Similan

28 Dive sites near The Bay, Koh Bon in Koh Similan

Find more dive sites in Thailand

ThailandThailand

Thailand

Got feedback?

Help us improve this dive site by giving us feedback.