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Three Trees, Koh Similan in Thailand

Located northeast of the 9th island in the Similan Islands, this dive site is known as Three Trees. It derives its name from the three prominent trees that mark the entry point. Starting from a shallow depth of about 5 meters, divers can explore a reef slope that descends to approximately 18 meters. Beyond this, they'll discover a pristine white sandy area adorned with isolated roots. Offshore, magnificent rocky areas await, adorned with vibrant schools of soft corals and a diverse array of large fish. Thanks to the tidal currents splitting on the island, the water visibility remains crystal clear, allowing for thrilling drift dives during strong tides.

Three Trees is a versatile dive site, appealing to divers of all skill levels. Its rich marine life encompasses captivating schools of fusiliers, spadefish, and barracudas, as well as fascinating sandy creatures like chinangoes, jawfish, and symbiotic goby. Additionally, divers can encounter enchanting shallow coral reefs teeming with colorful butterfly fish, spoonbills, and coral reef turtles. In areas with favorable tidal conditions, lucky divers may even be treated to sightings of magnificent manta rays.

This dive site boasts a visibility of up to 18 meters and offers a maximum depth of 22 meters. It is suitable for both beginner and advanced divers. Located in Phang-nga Province, Thailand, it is conveniently close to Snapper Alley. As you plan your diving adventure, be sure to include Three Trees on your list for an unforgettable underwater experience in Thailand.

Diving Conditions Score for Three Trees, Koh Similan in Thailand

7
Good

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

Dive Site Overview for Three Trees, Koh Similan in Thailand

Depth

22m

Visibility

18m

Experience Level

beginner
advanced

Weather Conditions for Three Trees, Koh Similan in Thailand

Wave Height

0.84m

Wind Speed

17.5 m/s

Water Temp

29.9°C

Visibility

29.92km

Cloud Cover

50%

Wave Period

8.35s

Air Temperature

29.8°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Three Trees
Alpha

Dive Score Chart for Three Trees

Best time to dive: 17:00 with score 7.75553992015968/10. Water conditions: Waves 0.86m, Wind 15.2 m/s.Best night dive time: 18:00 with score 7.24563992015968/10.

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

Sunrise at Three Trees: 06:00
Sunset at Three Trees: 18:00

Optimal diving conditions at Three Trees 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
17:00

Score: 7.8/10
Waves: 0.86m (8.35s), Wind: 15.2 m/s

🌞
Safest Overall
6:00

Score: 7.6/10
Waves: 0.84m (9.95s), Wind: 17.3 m/s

🌙
Best Night
18:00

Score: 7.2/10
Waves: 0.86m, Wind: 15.4 m/s

Seasonal Analysis for Three Trees, Koh Similan in Thailand
Alpha

Historical patterns and best seasons for diving at Three Trees, 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 Three Trees, 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 Three Trees, Koh Similan in Thailand

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

Ideal Conditions for Three Trees, 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 Three Trees, Koh Similan in Thailand

Three Trees, 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 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 Three Trees is Koh Similan

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Koh Similan

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