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Okinoshima Island

Okinoshima Island, a UNESCO World Heritage Site located 70 kilometers north-northwest of Fukuoka City in Japan, offers a magnificent underwater experience for divers. Although there is no public transportation available, it's worth the two-hour boat ride to reach this captivating destination.

Diving enthusiasts visiting Okinoshima will have the opportunity to witness impressive sights. Large schools of sea squirts, hawks, and hawk eels gracefully swim by, while migratory fish like Hiramasa and kangpachi add to the diversity of marine life. The underwater landscape is adorned with vibrant soft corals, creating a mesmerizing display as red snapper and yellow snapper move in synchronized formations.

Thanks to the warm Tsushima Current, which positively influences the island, divers can enjoy crystal-clear waters with a remarkable visibility of 12 meters. In the summer, the water temperature rises to a comfortable 29 degrees Celsius, creating an ideal environment for marine life to flourish. Everywhere you turn, you'll find abundant schools of fish, offering a truly captivating experience.

As a diver, it's important to note that Okinoshima Island accommodates divers of all levels. From beginners to advanced enthusiasts, everyone can explore the wonders of this dive site. The maximum depth reaches 23 meters, providing ample opportunities to dive deeper and discover hidden treasures beneath the surface.

For those seeking additional adventures, Okinoshima's proximity to Munakata Taisha Okitsumiya in Fukuoka Prefecture opens up possibilities for land-based exploration. Immersing yourself in both the underwater wonders and cultural heritage of this region promises a truly enriching experience.

Explore Okinoshima Island's underwater paradise and create unforgettable memories as you dive into the remarkable depths of the sea.

Diving Conditions Score for Okinoshima Island

6.8
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Okinoshima Island

Depth

23m

Visibility

12m

Experience Level

beginner
advanced

Weather Conditions for Okinoshima Island

Wave Height

0.78m

Wind Speed

17.7 m/s

Water Temp

23.5°C

Visibility

16.42km

Cloud Cover

25%

Wave Period

4.9s

Air Temperature

21.5°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Okinoshima Island
Alpha

Dive Score Chart for Okinoshima Island

Best time to dive: 12:00 with score 7.220933333333334/10. Water conditions: Waves 1.02m, Wind 24.1 m/s.Best night dive time: 19:00 with score 6.7402/10.

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

Sunrise at Okinoshima Island: 06:00
Sunset at Okinoshima Island: 18:00

Optimal diving conditions at Okinoshima 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
12:00

Score: 7.2/10
Waves: 1.02m (4.85s), Wind: 24.1 m/s

🌞
Safest Overall
17:00

Score: 7.2/10
Waves: 0.84m (4.9s), Wind: 16.3 m/s

🌙
Best Night
19:00

Score: 6.7/10
Waves: 0.78m, Wind: 17.7 m/s

Seasonal Analysis for Okinoshima Island
Alpha

Historical patterns and best seasons for diving at Okinoshima 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 Okinoshima Island

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 Okinoshima Island

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

Ideal Conditions for Okinoshima Island

Water Temp

Thermometer Emoji

23.4°C / 74.1°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

October

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Okinoshima Island

Okinoshima Island shows typical northern hemisphere patterns with June being the warmest month (23.4°C) and December the coldest (19.4°C). The calmest conditions typically occur in January with average wave heights of 0.2m 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.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 27, 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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