YOTSUSHIMA Jetty
Discover the mesmerizing underwater world surrounding the enchanting Ruzaoan Island in Japan. This hidden gem offers a unique diving experience with its four captivating reef islands, known as Yotsushima. Unlike the typical beach or boat entry, Jetty Dive allows divers to explore these natural wonders effortlessly. Just a short 5-minute ferry ride away from Tsuruoka, Yamagata Prefecture, Japan, this dive site is conveniently located and offers amenities such as a parking lot, water supply, and modern toilets.
Immerse yourself in the vibrant marine life inhabiting the pristine waters of Ruzaoan Island. Be astounded by the awe-inspiring diversity of fish species and the majesty of the iconic idols of the four islands, including the legendary Kobudai "Kinjiro" and the striking Madai "Hanatare." With visibility reaching up to 11 meters and a maximum depth of 16 meters, the underwater landscape reveals a captivating array of colors and textures that will captivate advanced and expert divers.
Satisfy your diving cravings at the closest dive resort to our dive center, exclusively open from July to October during the summer season. Unlock an unforgettable adventure beneath the surface as you explore the wonders of Ruzaoan Island, a true paradise for avid divers seeking an extraordinary underwater experience in Japan.
Immerse yourself in the vibrant marine life inhabiting the pristine waters of Ruzaoan Island. Be astounded by the awe-inspiring diversity of fish species and the majesty of the iconic idols of the four islands, including the legendary Kobudai "Kinjiro" and the striking Madai "Hanatare." With visibility reaching up to 11 meters and a maximum depth of 16 meters, the underwater landscape reveals a captivating array of colors and textures that will captivate advanced and expert divers.
Satisfy your diving cravings at the closest dive resort to our dive center, exclusively open from July to October during the summer season. Unlock an unforgettable adventure beneath the surface as you explore the wonders of Ruzaoan Island, a true paradise for avid divers seeking an extraordinary underwater experience in Japan.
Diving Conditions Score for YOTSUSHIMA Jetty
6.1
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for YOTSUSHIMA Jetty
Depth
16m
Visibility
11m
Experience Level
advanced
expert
Weather Conditions for YOTSUSHIMA Jetty
Wave Height
1m
Wind Speed
10 m/s
Water Temp
18°C
Visibility
15km
Cloud Cover
57.5%
Wave Period
8s
Air Temperature
20°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for YOTSUSHIMA Jetty
Alpha
Dive Score Chart for YOTSUSHIMA Jetty
Best time to dive: 6:00 with score 7.113333333333333/10. Water conditions: Waves 1m, Wind 10 m/s.Best night dive time: 0:00 with score 6.613333333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at YOTSUSHIMA Jetty: 06:00
Sunset at YOTSUSHIMA Jetty: 18:00
Optimal diving conditions at YOTSUSHIMA Jetty 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
6:00Score: 7.1/10
Waves: 1m (8s), Wind: 10 m/s
Best Night
0:00Score: 6.6/10
Waves: 1m, Wind: 10 m/s
Seasonal Analysis for YOTSUSHIMA JettyAlpha
Historical patterns and best seasons for diving at YOTSUSHIMA Jetty
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 YOTSUSHIMA Jetty
Winter
Avg. Score: 9.9/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for YOTSUSHIMA Jetty
January
Score: 10.0
February
Score: 9.9
December
Score: 9.8
Ideal Conditions for YOTSUSHIMA Jetty
Water Temp
23.9°C / 75.0°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for YOTSUSHIMA Jetty
YOTSUSHIMA Jetty shows typical northern hemisphere patterns with June being the warmest month (23.9°C) and December the coldest (19.9°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.
Last updated: 1 min. ago - Jun 22, 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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