Iejima Island
Diving enthusiasts have the opportunity to witness rare marine creatures such as the giant flying fish, red-headed coral fish, and red-headed frogfish. Explore the domes and caves to encounter fascinating species including goblins, red pine scorpionfish, turmeric clams, lobster pygmy goblins, and green pygmy goblins. Along the drop-offs, you'll also encounter flounder, spiny dogfish, and Napoleon fish.
The northern side of Iejima is characterized by its dynamic terrain featuring caves, arches, and drop-offs, providing an exciting diving adventure. On the other hand, the southern side offers serene dive spots with pristine white sand and scattered coral roots. Notably, this area holds historical significance as it served as a fierce battlefield during the Pacific War, with remnants of that era still visible underwater.
Optimize your diving experience with excellent visibility levels of 22m and a maximum depth of 19m. Whether you are a beginner or an advanced diver, Iejima welcomes all skill levels.
Dive into the underwater wonders of Iejima, Japan, and explore the incredible marine life and intriguing dive sites that await you.
Diving Conditions Score for Iejima Island
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Iejima Island
Depth
19m
Visibility
22m
Experience Level
Weather Conditions for Iejima Island
Wave Height
0.62m
Wind Speed
22.1 m/s
Water Temp
25.7°C
Visibility
17.04km
Cloud Cover
98%
Wave Period
4.3s
Air Temperature
25.5°C
Precipitation
0 mm
Dive Score Chart for Iejima Island
Best time to dive: 17:00 with score 8.004285714285714/10. Water conditions: Waves 0.6m, Wind 20.6 m/s.Best night dive time: 23:00 with score 7.733104395604395/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Iejima Island 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: 8.0/10
Waves: 0.6m (4.2s), Wind: 20.6 m/s
Score: 7.7/10
Waves: 0.64m, Wind: 19.9 m/s
Seasonal Analysis for Iejima IslandAlpha
Historical patterns and best seasons for diving at Iejima Island
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 Iejima Island
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Iejima Island
Ideal Conditions for Iejima Island
Water Temp
27.6°C / 81.7°F
July
Visibility
11.8m / 38.7ft
October
Wave Height
2.6m / 8.5ft
January
Wave Period
8.0s
January
Seasonal Insights for Iejima Island
Iejima Island shows typical northern hemisphere patterns with August being the warmest month (27.8°C) and January the coldest (14.0°C). The calmest conditions typically occur in January with average wave heights of 2.6m 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). April 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.
Last updated: 1 min. ago - Jun 18, 2026