Shikanoshima Island
This dive site is conveniently located about a 45-minute drive from the center of Fukuoka, Japan. Situated in the northern part of Hakata Bay, this island is connected to the mainland by a sandbar. Known as one of the top diving spots in Fukuoka, it is particularly suitable for beginners' courses.
During the summer season, divers can expect to encounter a variety of beautiful southern fish, including damselfish, hornbills, black lily gobies, and red damselfish. The abundance of marine sponges also attracts numerous nudibranchs to the area. From winter to spring, danglers and even seahorses can be spotted.
Due to its popularity, this site tends to be quite crowded during the summer months. The water depth ranges from 5 to 15 meters, with visibility typically around 5 meters in summer but potentially reaching 20 meters in autumn and winter.
For divers looking to explore this site, it is worth noting that the maximum depth is 9 meters, making it suitable for beginners. Located in Hiro, Higashi Ward, Fukuoka, Fukuoka Prefecture, Japan, it's easily accessible via 志賀島循環線.
Experience the wonders of this captivating dive site in Fukuoka, Japan, where clear waters and a diverse array of marine life await.
During the summer season, divers can expect to encounter a variety of beautiful southern fish, including damselfish, hornbills, black lily gobies, and red damselfish. The abundance of marine sponges also attracts numerous nudibranchs to the area. From winter to spring, danglers and even seahorses can be spotted.
Due to its popularity, this site tends to be quite crowded during the summer months. The water depth ranges from 5 to 15 meters, with visibility typically around 5 meters in summer but potentially reaching 20 meters in autumn and winter.
For divers looking to explore this site, it is worth noting that the maximum depth is 9 meters, making it suitable for beginners. Located in Hiro, Higashi Ward, Fukuoka, Fukuoka Prefecture, Japan, it's easily accessible via 志賀島循環線.
Experience the wonders of this captivating dive site in Fukuoka, Japan, where clear waters and a diverse array of marine life await.
Diving Conditions Score for Shikanoshima Island
8.2
Very GoodVery good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Shikanoshima Island
Depth
9m
Visibility
7m
Experience Level
beginner
Weather Conditions for Shikanoshima Island
Wave Height
0.08m
Wind Speed
6.2 m/s
Water Temp
25.5°C
Visibility
7.02km
Cloud Cover
84%
Wave Period
4.3s
Air Temperature
22.7°C
Precipitation
0.5 mm
Detailed 7-Day Diving Forecast for Shikanoshima Island
Alpha
Dive Score Chart for Shikanoshima Island
Best time to dive: 6:00 with score 8.120643137254902/10. Water conditions: Waves 0.08m, Wind 10.8 m/s.Best night dive time: 1:00 with score 8.350694636015325/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Shikanoshima Island: 06:00
Sunset at Shikanoshima Island: 18:00
Optimal diving conditions at Shikanoshima 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
1:00Score: 8.4/10
Waves: 0.08m (4.35s), Wind: 4.5 m/s
Safest Overall
6:00Score: 8.1/10
Waves: 0.08m (4.25s), Wind: 10.8 m/s
Best Day
6:00Score: 8.1/10
Waves: 0.08m, Wind: 10.8 m/s
Seasonal Analysis for Shikanoshima IslandAlpha
Historical patterns and best seasons for diving at Shikanoshima 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 Shikanoshima Island
Winter
Avg. Score: 8.7/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Shikanoshima Island
January
Score: 8.9
February
Score: 8.7
December
Score: 8.5
Ideal Conditions for Shikanoshima Island
Water Temp
26.9°C / 80.4°F
July
Visibility
15.0m / 49.2ft
November
Wave Height
1.3m / 4.3ft
January
Wave Period
8.0s
January
Seasonal Insights for Shikanoshima Island
Shikanoshima Island shows typical northern hemisphere patterns with August being the warmest month (27.3°C) and February the coldest (3.3°C). The calmest conditions typically occur in January with average wave heights of 1.3m 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 19, 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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