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Black Rock

Located in Southeast Asia, Black Rock is a renowned diving spot for divers seeking unique encounters with reef manta cleaning stations. At this site, cleaner wrasse diligently remove dead skin off the mantas' bodies, making it a fascinating spectacle. This dive spot earned its name from a prominent rock situated at a depth of 8 meters, where one of the buoys is set up.

Divers here have the opportunity to witness whitetip sharks engaging in feeding frenzies, spot silvertip sharks and even encounter majestic tiger sharks and whale sharks. This makes for an exhilarating underwater adventure that will leave divers with unforgettable memories.

It's important to be mindful of the reef top, which is situated at a depth of 5 – 12 meters and teems with delicate fire corals. Dive masters carefully plan dives based on the prevailing currents, as the northeastern tip of the south atoll experiences rapidly changing and occasionally intense currents, reaching speeds of up to 3.5 knots. The reef top features a well-developed channel system that drains seawater into and out of the lagoon, creating a mesmerizing cascading waterfall effect. This phenomenon results in a distinct push and pull current towards the northeast edge of the reef. Divers should exercise caution to avoid being carried away into the open sea.

With an impressive visibility of 21 meters and a maximum depth of 27 meters, this dive spot offers an unparalleled opportunity for advanced divers to explore the underwater wonders of Black Rock. Grab your gear and get ready for an incredible diving experience that combines natural beauty, thrilling encounters, and the excitement of exploring one of the few known reef manta cleaning stations in Southeast Asia.

Diving Conditions Score for Black Rock

6.6
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Black Rock

Depth

27m

Visibility

21m

Experience Level

advanced

Weather Conditions for Black Rock

Wave Height

0.46m

Wind Speed

22.3 m/s

Water Temp

30.9°C

Visibility

5.1km

Cloud Cover

96%

Wave Period

2.95s

Air Temperature

28.3°C

Precipitation

0.6 mm

Detailed 7-Day Diving Forecast for Black Rock
Alpha

Dive Score Chart for Black Rock

Best time to dive: 8:00 with score 6.728/10. Water conditions: Waves 0.46m, Wind 22.1 m/s.Best night dive time: 19:00 with score 6.3071/10.

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

Sunrise at Black Rock: 06:00
Sunset at Black Rock: 18:00

Optimal diving conditions at Black 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.

🌞
Best Overall
8:00

Score: 6.7/10
Waves: 0.46m (3.05s), Wind: 22.1 m/s

🌙
Best Night
19:00

Score: 6.3/10
Waves: 0.54m, Wind: 22.2 m/s

Seasonal Analysis for Black Rock
Alpha

Historical patterns and best seasons for diving at Black 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 Black Rock

Winter

Avg. Score: 10.0/10

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

Best Months for Black Rock

January
Score: 10.0
February
Score: 10.0
March
Score: 10.0

Ideal Conditions for Black Rock

Water Temp

Thermometer Emoji

27.2°C / 81.0°F

August

Visibility

Telescope Emoji

13.1m / 43.0ft

June

Wave Height

Wave Emoji

1.6m / 5.2ft

June

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Black Rock

Black Rock shows typical northern hemisphere patterns with June being the warmest month (28.6°C) and January the coldest (23.4°C). The calmest conditions typically occur in June with average wave heights of 1.6m and wave periods of 8.0s. The most comfortable wave conditions are in June 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 0.5mm of precipitation. For beginners, the best time to visit would be during June to August, 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 22, 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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