Sengen Dragon Hole
Explore a diverse array of marine species at this site, including green turtles (with a remarkable 120% encounter rate), swallowtails, butterfly fish, amberjacks, debassel fish, senakirilis sparrows, yellow snapper, snappers, longnose hawkfish, and gray reef sharks (with a lower encounter rate). The high encounter rate of green turtles adds an enticing element to this dive experience.
Enjoy excellent underwater visibility of 26m and a maximum depth of 15m, providing optimal conditions for exploration. This dive site is especially suitable for beginners, offering a safe and captivating environment to develop diving skills. Conveniently located near Otsukawa, Amagi, Oshima County, Kagoshima Prefecture, Japan, this accessible dive site ensures a memorable and remarkable underwater adventure.
Diving Conditions Score for Sengen Dragon Hole
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Sengen Dragon Hole
Depth
15m
Visibility
26m
Experience Level
Weather Conditions for Sengen Dragon Hole
Wave Height
0.9m
Wind Speed
16.9 m/s
Water Temp
26.4°C
Visibility
26.36km
Cloud Cover
73%
Wave Period
5.05s
Air Temperature
27.6°C
Precipitation
0 mm
Dive Score Chart for Sengen Dragon Hole
Best time to dive: 14:00 with score 7.780033333333334/10. Water conditions: Waves 0.94m, Wind 17.4 m/s.Best night dive time: 19:00 with score 7.301833333333334/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Sengen Dragon Hole 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: 7.8/10
Waves: 0.94m (5.6s), Wind: 17.4 m/s
Score: 7.8/10
Waves: 0.92m (5.65s), Wind: 15 m/s
Score: 7.3/10
Waves: 0.92m, Wind: 15.7 m/s
Seasonal Analysis for Sengen Dragon HoleAlpha
Historical patterns and best seasons for diving at Sengen Dragon Hole
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 Sengen Dragon Hole
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Sengen Dragon Hole
Ideal Conditions for Sengen Dragon Hole
Water Temp
27.9°C / 82.2°F
July
Visibility
11.3m / 37.1ft
January
Wave Height
1.6m / 5.2ft
January
Wave Period
8.0s
January
Seasonal Insights for Sengen Dragon Hole
Sengen Dragon Hole shows typical northern hemisphere patterns with August being the warmest month (28.0°C) and February the coldest (12.1°C). The calmest conditions typically occur in January with average wave heights of 1.6m 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 0.8mm 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 20, 2026