Shirahama
The dive site in the water near the Kansai area has long been a favorite among divers. With its convenient location and popularity as a hot spring tourist attraction, it offers easy access for both beginner and advanced divers. Located in the historic Kii Peninsula, this area provides numerous entry points, including beach and boat entry options.
During the fall season, divers can enjoy observing a variety of marine life, including migratory fish such as hawks, pike, yellowtail, and impressive creatures like the green sea turtles. The diverse underwater environment here showcases an array of macro and wide creatures. Thanks to the influence of the Kuroshio Current, divers can encounter many tropical species.
One of the highlights of this dive site is a fascinating wreck lying at a depth of approximately 28 meters. This artificial reef teems with abundant marine life, attracting large schools of small fish. Thrilling encounters with lampreys, as they chase these schools, create a truly unforgettable spectacle.
Dive site details:
- Visibility: Up to 8 meters
- Maximum depth: 18 meters
- Recommended diver levels: Suitable for both beginners and advanced divers
- Country: Japan
- Close location: Yuzaki, 白浜温泉線, Yuzaki, Shirahama,
Nishimuro County, Wakayama Prefecture, 6492211, Japan
During the fall season, divers can enjoy observing a variety of marine life, including migratory fish such as hawks, pike, yellowtail, and impressive creatures like the green sea turtles. The diverse underwater environment here showcases an array of macro and wide creatures. Thanks to the influence of the Kuroshio Current, divers can encounter many tropical species.
One of the highlights of this dive site is a fascinating wreck lying at a depth of approximately 28 meters. This artificial reef teems with abundant marine life, attracting large schools of small fish. Thrilling encounters with lampreys, as they chase these schools, create a truly unforgettable spectacle.
Dive site details:
- Visibility: Up to 8 meters
- Maximum depth: 18 meters
- Recommended diver levels: Suitable for both beginners and advanced divers
- Country: Japan
- Close location: Yuzaki, 白浜温泉線, Yuzaki, Shirahama,
Nishimuro County, Wakayama Prefecture, 6492211, Japan
Diving Conditions Score for Shirahama
7.3
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Shirahama
Depth
18m
Visibility
8m
Experience Level
beginner
advanced
Weather Conditions for Shirahama
Wave Height
0.82m
Wind Speed
9.4 m/s
Water Temp
24.5°C
Visibility
28.62km
Cloud Cover
81%
Wave Period
5.6s
Air Temperature
22.7°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Shirahama
Alpha
Dive Score Chart for Shirahama
Best time to dive: 12:00 with score 7.949399999999999/10. Water conditions: Waves 0.92m, Wind 4.8 m/s.Best night dive time: 22:00 with score 7.681614124293785/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Shirahama: 06:00
Sunset at Shirahama: 18:00
Optimal diving conditions at Shirahama 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
12:00Score: 7.9/10
Waves: 0.92m (5.35s), Wind: 4.8 m/s
Best Night
22:00Score: 7.7/10
Waves: 0.84m, Wind: 4.1 m/s
Seasonal Analysis for ShirahamaAlpha
Historical patterns and best seasons for diving at Shirahama
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 Shirahama
Winter
Avg. Score: 8.6/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Shirahama
January
Score: 8.8
February
Score: 8.6
December
Score: 8.5
Ideal Conditions for Shirahama
Water Temp
27.0°C / 80.6°F
August
Visibility
15.7m / 51.5ft
November
Wave Height
1.2m / 3.9ft
November
Wave Period
8.0s
January
Seasonal Insights for Shirahama
Shirahama shows typical northern hemisphere patterns with August being the warmest month (27.0°C) and January the coldest (2.3°C). The calmest conditions typically occur in November with average wave heights of 1.2m and wave periods of 8.0s. The most comfortable wave conditions are in November 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 November to January, 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 18, 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.
13 Dive sites near Shirahama in
Got feedback?
Help us improve this dive site by giving us feedback.