Senohama Reef
This dive site in Japan offers a unique experience with over 20 sunken iron boxes, measuring 3m in length and width. Originally placed by the former Nishinoumi Town to create a fish habitat, this location is now teeming with migratory fish. As you explore the sandy bottom, these boxes can be found scattered around, creating an intriguing underwater scene. Whether you prefer to swim around and circle back to observe the fish or focus on macro photography, this site offers plenty of opportunities to encounter unique species like the pikachu nudibranch.
Divers of all skill levels - beginner, advanced, and expert - can enjoy exploring this site's fascinating ecosystem. The abundance of marine life here includes sparrowfishes, snappers, groupers, scorpionfish, schools of yellowtail, scampi, turtles, and occasional appearances by sharks or rays. Nudibranch enthusiasts will be pleased by the high population of vibrantly colored species like the pikachu. With a maximum depth of 17m and visibility reaching 11m, this dive site promises an unforgettable underwater experience.
Located near the 平城高茂岬線 in Funakoshi, Ainan, Minami-Uwa County, Ehime Prefecture, Japan, this site is easily accessible for divers. Immerse yourself in the wonders of this Japanese dive location and discover a world beneath the waves that will captivate and inspire divers of all backgrounds.
Divers of all skill levels - beginner, advanced, and expert - can enjoy exploring this site's fascinating ecosystem. The abundance of marine life here includes sparrowfishes, snappers, groupers, scorpionfish, schools of yellowtail, scampi, turtles, and occasional appearances by sharks or rays. Nudibranch enthusiasts will be pleased by the high population of vibrantly colored species like the pikachu. With a maximum depth of 17m and visibility reaching 11m, this dive site promises an unforgettable underwater experience.
Located near the 平城高茂岬線 in Funakoshi, Ainan, Minami-Uwa County, Ehime Prefecture, Japan, this site is easily accessible for divers. Immerse yourself in the wonders of this Japanese dive location and discover a world beneath the waves that will captivate and inspire divers of all backgrounds.
Diving Conditions Score for Senohama Reef
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 Senohama Reef
Depth
17m
Visibility
11m
Experience Level
beginner
advanced
expert
Weather Conditions for Senohama Reef
Wave Height
0.64m
Wind Speed
8.1 m/s
Water Temp
24.7°C
Visibility
21.06km
Cloud Cover
71%
Wave Period
5.35s
Air Temperature
24.5°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Senohama Reef
Alpha
Dive Score Chart for Senohama Reef
Best time to dive: 8:00 with score 7.885911320754717/10. Water conditions: Waves 0.66m, Wind 8.9 m/s.Best night dive time: 0:00 with score 8.286540251572328/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Senohama Reef: 06:00
Sunset at Senohama Reef: 18:00
Optimal diving conditions at Senohama Reef 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
0:00Score: 8.3/10
Waves: 0.58m (5.3s), Wind: 6.8 m/s
Safest Overall
8:00Score: 7.9/10
Waves: 0.66m (5.3s), Wind: 8.9 m/s
Best Day
8:00Score: 7.9/10
Waves: 0.66m, Wind: 8.9 m/s
Seasonal Analysis for Senohama ReefAlpha
Historical patterns and best seasons for diving at Senohama Reef
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 Senohama Reef
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 Senohama Reef
January
Score: 8.6
February
Score: 8.4
December
Score: 8.4
Ideal Conditions for Senohama Reef
Water Temp
27.2°C / 81.0°F
August
Visibility
13.4m / 44.0ft
November
Wave Height
1.7m / 5.6ft
October
Wave Period
8.0s
January
Seasonal Insights for Senohama Reef
Senohama Reef shows typical northern hemisphere patterns with August being the warmest month (27.2°C) and February the coldest (3.8°C). The calmest conditions typically occur in October with average wave heights of 1.7m and wave periods of 8.0s. The most comfortable wave conditions are in October 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 October to December, 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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