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Shimamawari

Discover the breathtaking underwater wonders of Kushimoto, Japan. Immerse yourself in an unforgettable dive site where the topography resembles the majestic Ayers Rock in Australia, now gracefully submerged beneath the water. With depths ranging from 6m to 30m, this site offers a diverse range of exploration opportunities.

Divers will be thrilled to encounter stunning drop-offs in all four cardinal directions: east, west, north, and south. On the west side, a hidden gem awaits in the form of a small cave, accompanied by a remote root. While the current may occasionally pick up pace, it remains manageable and suitable for divers of various experience levels.

Atop the roots, a vibrant tapestry of corals and anemones welcomes divers into a world of vibrant colors and marine life. Marvel at the remarkable sight of migratory fish, including the impressive amberjack and yellowtails, making their way through these waters. Throughout the year, the presence of hawksbill turtles and abundant whitebait adds to the excitement of each dive.

The site boasts excellent visibility of up to 12m, allowing divers to indulge in panoramic views of the underwater landscape. With a maximum depth of 20m, advanced divers will find plenty of intriguing features to explore and photograph. Located in Kushimoto, Higashimuro County, Wakayama Prefecture, Japan, this dive site promises an extraordinary adventure for divers seeking unforgettable marine encounters.

Prepare to be captivated by the dynamic beauty of the submerged Ayers Rock-like structure and its surroundings. Dive into the crystal-clear waters teeming with tropical marine life, from schools of snapper and white snapper to vibrant clownfish and delicate soft corals. Don't miss the chance to observe the enchanting migratory fish as they gracefully navigate their way through these underwater realms.

Experience the wonders of this exceptional dive site, offering an optimized and memorable underwater exploration experience tailored to the needs of advanced divers.

Diving Conditions Score for Shimamawari

8.2
Very Good

Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Shimamawari

Depth

20m

Visibility

12m

Experience Level

advanced

Weather Conditions for Shimamawari

Wave Height

0.94m

Wind Speed

1.4 m/s

Water Temp

25.3°C

Visibility

4km

Cloud Cover

48%

Wave Period

7.45s

Air Temperature

24.4°C

Precipitation

1.2 mm

Detailed 7-Day Diving Forecast for Shimamawari
Alpha

Dive Score Chart for Shimamawari

Best time to dive: 8:00 with score 6.985/10. Water conditions: Waves 1.34m, Wind 5.8 m/s.Best night dive time: 3:00 with score 7.300140096618357/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Shimamawari: 06:00
Sunset at Shimamawari: 18:00

Optimal diving conditions at Shimamawari 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
3:00

Score: 7.3/10
Waves: 0.98m (6.9s), Wind: 2.3 m/s

🌞
Safest Overall
8:00

Score: 7.0/10
Waves: 1.34m (6s), Wind: 5.8 m/s

🌞
Best Day
8:00

Score: 7.0/10
Waves: 1.34m, Wind: 5.8 m/s

Seasonal Analysis for Shimamawari
Alpha

Historical patterns and best seasons for diving at Shimamawari

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 Shimamawari

Winter

Avg. Score: 8.7/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Shimamawari

January
Score: 8.9
December
Score: 8.7
February
Score: 8.5

Ideal Conditions for Shimamawari

Water Temp

Thermometer Emoji

26.8°C / 80.2°F

August

Visibility

Telescope Emoji

14.4m / 47.2ft

November

Wave Height

Wave Emoji

1.2m / 3.9ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Shimamawari

Shimamawari shows typical northern hemisphere patterns with August being the warmest month (26.8°C) and January the coldest (3.5°C). The calmest conditions typically occur in January with average wave heights of 1.2m 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.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 20, 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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