Iki Island
This dive site is located in the Genkai Sea, a vibrant destination situated in the heart of Kyushu and Tsushima in Japan. With dimensions of 17km from north to south and 14km from east to west, this island offers an immersive diving experience. The underwater environment is adorned with captivating underwater landscapes, featuring dynamic roots, stunningly colorful coral, and a plethora of plankton that attracts an abundance of marine life. Explorers will also encounter a noteworthy area adorned with enigmatic megaliths, reminiscent of intricate human carvings.
The Genkai Sea boasts a kaleidoscope of brightly hued soft corals and a diverse range of seaweeds. During the autumn season, divers are likely to witness the mesmerizing sight of colossal schools of yellowtail, flathead mackerel, groupers, grasshoppers, bristletoe, and takabae, as well as majestic stingrays and gigantic mallard rays. Additionally, the enigmatic Etisian jellyfish may grace the waters during winter.
With a visibility of 10 meters and a maximum depth of 13 meters, this dive site presents a challenge suitable for advanced and expert divers. Located near Ishidacho-Yutakeiteyoshifure, Iki, Nagasaki Prefecture, 811-5122, Japan, it offers convenient access to those seeking a remarkable underwater adventure. Explore the wonders of the Genkai Sea and create unforgettable diving memories.
The Genkai Sea boasts a kaleidoscope of brightly hued soft corals and a diverse range of seaweeds. During the autumn season, divers are likely to witness the mesmerizing sight of colossal schools of yellowtail, flathead mackerel, groupers, grasshoppers, bristletoe, and takabae, as well as majestic stingrays and gigantic mallard rays. Additionally, the enigmatic Etisian jellyfish may grace the waters during winter.
With a visibility of 10 meters and a maximum depth of 13 meters, this dive site presents a challenge suitable for advanced and expert divers. Located near Ishidacho-Yutakeiteyoshifure, Iki, Nagasaki Prefecture, 811-5122, Japan, it offers convenient access to those seeking a remarkable underwater adventure. Explore the wonders of the Genkai Sea and create unforgettable diving memories.
Diving Conditions Score for Iki Island
5.9
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Iki Island
Depth
13m
Visibility
10m
Experience Level
advanced
expert
Weather Conditions for Iki Island
Wave Height
1.1m
Wind Speed
23.1 m/s
Water Temp
23.8°C
Visibility
1.94km
Cloud Cover
95%
Wave Period
5.6s
Air Temperature
20°C
Precipitation
3.2 mm
Detailed 7-Day Diving Forecast for Iki Island
Alpha
Dive Score Chart for Iki Island
Best time to dive: 14:00 with score 6.8307/10. Water conditions: Waves 1.06m, Wind 20.5 m/s.Best night dive time: 18:00 with score 4.78/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Iki Island: 06:00
Sunset at Iki Island: 18:00
Optimal diving conditions at Iki 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.
Best Overall
14:00Score: 6.8/10
Waves: 1.06m (5.3s), Wind: 20.5 m/s
Best Night
18:00Score: 4.8/10
Waves: 1.06m, Wind: 22.3 m/s
Seasonal Analysis for Iki IslandAlpha
Historical patterns and best seasons for diving at Iki 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 Iki Island
Winter
Avg. Score: 8.5/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Iki Island
January
Score: 8.7
February
Score: 8.4
December
Score: 8.4
Ideal Conditions for Iki Island
Water Temp
26.8°C / 80.2°F
August
Visibility
12.7m / 41.7ft
November
Wave Height
1.6m / 5.2ft
January
Wave Period
8.0s
January
Seasonal Insights for Iki Island
Iki Island shows typical northern hemisphere patterns with August being the warmest month (26.8°C) and February the coldest (3.6°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 0.0mm 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 23, 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.
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