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Jansom Bay, Koh Tao in Thailand

Jansom Bay dive site, also known as the "Japanese Garden," is a popular diving spot located on the western side of Nan Yuan Island, off the coast of Koh Tao in Thailand. This dive site offers a calm and sheltered environment, perfect for diving even on rough sea days when waves are directed towards the east.

The underwater landscape at Jansom Bay is truly captivating. The sandy bottom is teeming with life, with numerous gobies finding their home amidst the vibrant and healthy coral. The coral formations resemble a breathtaking Japanese garden, showcasing a diverse array of corals. The marine life is abundant, adding an enchanting element to the diving experience.

With a maximum depth of 7 meters and a visibility of 10 meters, Jansom Bay is an ideal dive site for divers of all levels, including beginners. Whether you are just starting your diving journey or an experienced diver, this site offers something for everyone. As you venture east from the beach at Nan Yuan, the depth gradually deepens, and heading north allows for thrilling wall diving and the opportunity for macro observations along the island.

If you are planning a dive trip to Jansom Bay, it is conveniently located near Songserm Road in Baan Mae Haad, Surat Thani Province. The entrance fee to the dive site is 200 bahts.

Immerse yourself in the beauty of Jansom Bay dive site and discover the wonders that lie beneath the surface. Experience the tranquility and vibrant marine life that make this diving destination in Thailand truly remarkable.

Diving Conditions Score for Jansom Bay, Koh Tao in Thailand

7.5
Good

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

Dive Site Overview for Jansom Bay, Koh Tao in Thailand

Depth

7m

Visibility

10m

Experience Level

beginner

Weather Conditions for Jansom Bay, Koh Tao in Thailand

Wave Height

0.26m

Wind Speed

16.2 m/s

Water Temp

30.6°C

Visibility

18.48km

Cloud Cover

43%

Wave Period

2.35s

Air Temperature

28.4°C

Precipitation

0.5 mm

Detailed 7-Day Diving Forecast for Jansom Bay
Alpha

Dive Score Chart for Jansom Bay

Best time to dive: 7:00 with score 8.267190909090909/10. Water conditions: Waves 0.14m, Wind 7.2 m/s.Best night dive time: 5:00 with score 7.511732624113476/10.

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

Sunrise at Jansom Bay: 06:00
Sunset at Jansom Bay: 18:00

Optimal diving conditions at Jansom Bay 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
7:00

Score: 8.3/10
Waves: 0.14m (2.2s), Wind: 7.2 m/s

🌙
Best Night
5:00

Score: 7.5/10
Waves: 0.16m, Wind: 16.5 m/s

Seasonal Analysis for Jansom Bay, Koh Tao in Thailand
Alpha

Historical patterns and best seasons for diving at Jansom Bay, Koh Tao 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 Jansom Bay, Koh Tao 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 Jansom Bay, Koh Tao in Thailand

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

Ideal Conditions for Jansom Bay, Koh Tao in Thailand

Water Temp

Thermometer Emoji

27.2°C / 81.0°F

August

Visibility

Telescope Emoji

11.2m / 36.7ft

March

Wave Height

Wave Emoji

1.7m / 5.6ft

March

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Jansom Bay, Koh Tao in Thailand

Jansom Bay, Koh Tao in Thailand shows typical northern hemisphere patterns with June being the warmest month (28.3°C) and December the coldest (23.0°C). The calmest conditions typically occur in March with average wave heights of 1.7m 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 0.2mm 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 Jansom Bay is Koh Tao

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Koh Tao

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