Occhogahama
This dive site is located at the southwestern point of the island, offering a beach entry with a large cave and an abundance of nudibranchs, which makes it a popular spot for divers. Entry and exit can be conveniently done through the dedicated stairs provided.
The cave and its surroundings are teeming with various species of nudibranchs, including the Great Crested Nudibranch and Bob's Sun Nudibranch. Within the cave, divers can marvel at creatures that thrive in darkness, such as blue clams, lobsters, and sea turtles. Additionally, rare crustaceans like fritillary shrimps and snail crabs can be found hiding under the cavern at the cave's end.
During the descent, divers will encounter large stones and a sizable cave entrance just beyond them. The cave gradually deepens from the entrance to the exit, offering ample opportunities to observe dark-adapted marine life. Exiting the cave, a cavern expands, providing a hiding place for elusive shrimp species. It's important to note that the cave has a shallow entrance but deepens towards the exit, so caution should be exercised when there is a swell, as the cave may suddenly emerge on the shallow side.
With a visibility of 23m and a maximum depth of 20m, this dive site is suitable for divers of various skill levels, including beginners and advanced divers. It is situated in Japan, specifically near 中平, Hachijo, Hachijō Subprefecture, Tokyo.
The cave and its surroundings are teeming with various species of nudibranchs, including the Great Crested Nudibranch and Bob's Sun Nudibranch. Within the cave, divers can marvel at creatures that thrive in darkness, such as blue clams, lobsters, and sea turtles. Additionally, rare crustaceans like fritillary shrimps and snail crabs can be found hiding under the cavern at the cave's end.
During the descent, divers will encounter large stones and a sizable cave entrance just beyond them. The cave gradually deepens from the entrance to the exit, offering ample opportunities to observe dark-adapted marine life. Exiting the cave, a cavern expands, providing a hiding place for elusive shrimp species. It's important to note that the cave has a shallow entrance but deepens towards the exit, so caution should be exercised when there is a swell, as the cave may suddenly emerge on the shallow side.
With a visibility of 23m and a maximum depth of 20m, this dive site is suitable for divers of various skill levels, including beginners and advanced divers. It is situated in Japan, specifically near 中平, Hachijo, Hachijō Subprefecture, Tokyo.
Diving Conditions Score for Occhogahama
5.7
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Occhogahama
Depth
20m
Visibility
23m
Experience Level
beginner
advanced
Weather Conditions for Occhogahama
Wave Height
1.66m
Wind Speed
29.2 m/s
Water Temp
23.1°C
Visibility
3.3km
Cloud Cover
76%
Wave Period
7.1s
Air Temperature
22.2°C
Precipitation
0.4 mm
Detailed 7-Day Diving Forecast for Occhogahama
Alpha
Dive Score Chart for Occhogahama
Best time to dive: 6:00 with score 6.0734666666666675/10. Water conditions: Waves 1.36m, Wind 22.6 m/s.Best night dive time: 0:00 with score 4.696600000000001/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Occhogahama: 06:00
Sunset at Occhogahama: 18:00
Optimal diving conditions at Occhogahama 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: 6.1/10
Waves: 1.36m (7.15s), Wind: 22.6 m/s
Best Night
0:00Score: 4.7/10
Waves: 1.22m, Wind: 9.3 m/s
Seasonal Analysis for OcchogahamaAlpha
Historical patterns and best seasons for diving at Occhogahama
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 Occhogahama
Winter
Avg. Score: 8.4/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Occhogahama
January
Score: 8.5
December
Score: 8.4
February
Score: 8.3
Ideal Conditions for Occhogahama
Water Temp
26.8°C / 80.2°F
August
Visibility
11.9m / 39.0ft
July
Wave Height
3.4m / 11.2ft
July
Wave Period
8.0s
January
Seasonal Insights for Occhogahama
Occhogahama shows typical northern hemisphere patterns with August being the warmest month (26.8°C) and January the coldest (8.7°C). The calmest conditions typically occur in July with average wave heights of 3.4m and wave periods of 8.0s. The most comfortable wave conditions are in July 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). July is usually the driest month with 0.1mm of precipitation. For beginners, the best time to visit would be during July to September, 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 17, 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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