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Koino Ura

Koino Ura is a popular diving spot in Fukutsu City, Japan, offering breathtaking views of the Genkai Sea. It is conveniently accessible from both Kitakyushu and Fukuoka. This coastal area is renowned for its sea turtle nesting grounds, attracting these gentle creatures in July. Due to its easy entry and exit points, this site is highly recommended for beginners looking to embark on their diving journey.

Divers at Koino Ura can delight in encounters with various marine species, including scorpionfish, stingrays, mackerel, snappers, sunfish, flatfish, yellowfin reef sharks, and stingrays. The winter to spring period is particularly fascinating as it presents an opportunity to witness the diverse array of nudibranchs.

The abundance of macro-organisms, such as nudibranchs and moss phalaropes, makes Koino Ura a favorite spot for underwater photographers and fish enthusiasts. Explorers may also chance upon the enchanting sight of sea snails and sea horses. During the spring and early summer months, encounters with stingrays are frequent, with occasional sightings of chimaeras and spiny stingrays.

With a maximum depth of 9 meters and a visibility of 7 meters, Koino Ura provides an ideal setting for beginners to hone their diving skills. Whether you are a novice or an experienced diver, this captivating dive site promises an unforgettable underwater adventure. Discover the wonders of Koino Ura and create lasting memories in this stunning locale within the Fukutsu City, Fukuoka Prefecture, Japan.

Diving Conditions Score for Koino Ura

6.9
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 Koino Ura

Depth

9m

Visibility

7m

Experience Level

beginner

Weather Conditions for Koino Ura

Wave Height

1.18m

Wind Speed

20.6 m/s

Water Temp

25.1°C

Visibility

6.9km

Cloud Cover

38%

Wave Period

8.35s

Air Temperature

23.1°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Koino Ura
Alpha

Dive Score Chart for Koino Ura

Best time to dive: 6:00 with score 7.172443902439024/10. Water conditions: Waves 1.16m, Wind 20.3 m/s.Best night dive time: 4:00 with score 6.706569696969697/10.

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

Sunrise at Koino Ura: 06:00
Sunset at Koino Ura: 18:00

Optimal diving conditions at Koino Ura 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
6:00

Score: 7.2/10
Waves: 1.16m (8.2s), Wind: 20.3 m/s

🌙
Best Night
4:00

Score: 6.7/10
Waves: 1.04m, Wind: 19.2 m/s

Seasonal Analysis for Koino Ura
Alpha

Historical patterns and best seasons for diving at Koino Ura

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 Koino Ura

Winter

Avg. Score: 8.9/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Koino Ura

January
Score: 9.1
February
Score: 8.8
December
Score: 8.7

Ideal Conditions for Koino Ura

Water Temp

Thermometer Emoji

26.8°C / 80.2°F

July

Visibility

Telescope Emoji

15.4m / 50.5ft

November

Wave Height

Wave Emoji

1.0m / 3.3ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Koino Ura

Koino Ura shows typical northern hemisphere patterns with July being the warmest month (26.8°C) and February the coldest (2.5°C). The calmest conditions typically occur in January with average wave heights of 1.0m 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 21, 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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