South Rock
Expect an array of diverse marine life at this dive site, including snappers, groupers, scorpionfish, rockfish schools, amberjack, yellowtail, turtles, and intermittent appearances by sharks, rays, frogfish, and flounders. However, it's important to note that the fish population here may be comparatively smaller than other nearby spots. The dynamic topography of the area lacks hiding places for smaller fish, making it challenging for medium-sized fish to gather for food. Nonetheless, the unique underwater landscape and the possibility of encountering larger species make this a thrilling spot for experienced divers.
Visibility at this dive site is approximately 20 meters, offering a favorable underwater viewing experience. The maximum depth is 23 meters, making it suitable for advanced and expert divers. Situated in Kashima, Ainan, Minami-Uwa County, Ehime Prefecture, Japan, this incredible dive location presents an opportunity to explore the stunning underwater world Japan has to offer.
Diving Conditions Score for South Rock
Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for South Rock
Depth
23m
Visibility
20m
Experience Level
Weather Conditions for South Rock
Wave Height
1.54m
Wind Speed
29 m/s
Water Temp
24.2°C
Visibility
17.76km
Cloud Cover
100%
Wave Period
6.05s
Air Temperature
24.8°C
Precipitation
0 mm
Dive Score Chart for South Rock
Best time to dive: 8:00 with score 6.253733333333333/10. Water conditions: Waves 1.6m, Wind 36.7 m/s.Best night dive time: 0:00 with score 6.816666666666666/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at South Rock 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.
Score: 6.8/10
Waves: 0.86m (4.15s), Wind: 24.9 m/s
Score: 6.3/10
Waves: 1.6m (5.3s), Wind: 36.7 m/s
Score: 6.3/10
Waves: 1.6m, Wind: 36.7 m/s
Seasonal Analysis for South RockAlpha
Historical patterns and best seasons for diving at South Rock
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 South Rock
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for South Rock
Ideal Conditions for South Rock
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 South Rock
South Rock 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 20, 2026