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Bajo Negro, Black Rock

Black Rock is a captivating dive site located in the National Park of Santa Rosa in the Provincia Guanacaste, Costa Rica. As part of Bat Island, it offers an exhilarating diving experience for advanced and expert divers. After exploring the thrilling depths of Big Scare, divers can conclude their day with a memorable dive at Black Rock, which is approximately 45 kilometers away from Potrero.

What sets Black Rock apart is its element of surprise. At first, the water may seem tranquil, but then suddenly, divers find themselves encountering a magnificent sailfish or a mesmerizing school of barracuda swimming alongside them. However, it's important to note that the current at Black Rock can be strong at times.

The dive site itself is a haven of natural wonders, boasting an abundance of beautiful sponges, corals, and an array of marine life. Divers can expect to encounter eagle rays, devil rays, mantas, and a myriad of colorful fish. This makes Black Rock one of the finest dive sites in the area.

While exploring the underwater realm at Black Rock, divers may also come across fascinating creatures such as moray eels, schools of barracuda, white tip sharks, nurse sharks, and more. This dive site truly offers divers an opportunity to immerse themselves in a magnificent underwater world.

However, it's worth mentioning that Black Rock can be affected by strong currents and surge, adding an element of excitement and adventure to the diving experience. With a maximum depth of 22m and a visibility of 11m, divers can fully appreciate the beauty and diversity that Black Rock has to offer.

For divers seeking a remarkable diving adventure in Costa Rica, Black Rock is the cherry on top of the cake after an exhilarating dive at Big Scare. Don't miss the chance to get lost in the enchanting school of fish and encounter a wide variety of captivating marine life.

Diving Conditions Score for Bajo Negro, Black Rock

6.9
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 Bajo Negro, Black Rock

Depth

22m

Visibility

11m

Experience Level

advanced
expert

Weather Conditions for Bajo Negro, Black Rock

Wave Height

1.02m

Wind Speed

14 m/s

Water Temp

30°C

Visibility

10.28km

Cloud Cover

99%

Wave Period

12.75s

Air Temperature

25°C

Precipitation

1.3 mm

Detailed 7-Day Diving Forecast for Bajo Negro, Black Rock
Alpha

Dive Score Chart for Bajo Negro, Black Rock

Best time to dive: 17:00 with score 7.573312903225807/10. Water conditions: Waves 1.02m, Wind 21.4 m/s.Best night dive time: 4:00 with score 7.201037467700259/10.

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

Sunrise at Bajo Negro, Black Rock: 06:00
Sunset at Bajo Negro, Black Rock: 18:00

Optimal diving conditions at Bajo Negro, 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
17:00

Score: 7.6/10
Waves: 1.02m (12.4s), Wind: 21.4 m/s

🌞
Safest Overall
6:00

Score: 7.5/10
Waves: 1.02m (12.9s), Wind: 8.6 m/s

🌙
Best Night
4:00

Score: 7.2/10
Waves: 1m, Wind: 5.9 m/s

Seasonal Analysis for Bajo Negro, Black Rock
Alpha

Historical patterns and best seasons for diving at Bajo Negro, 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 Bajo Negro, Black Rock

Winter

Avg. Score: 9.4/10

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

Best Months for Bajo Negro, Black Rock

January
Score: 9.5
February
Score: 9.5
March
Score: 9.4

Ideal Conditions for Bajo Negro, Black Rock

Water Temp

Thermometer Emoji

27.0°C / 80.6°F

May

Visibility

Telescope Emoji

11.1m / 36.4ft

December

Wave Height

Wave Emoji

1.7m / 5.6ft

September

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Bajo Negro, Black Rock

Bajo Negro, Black Rock shows typical northern hemisphere patterns with April being the warmest month (27.8°C) and November the coldest (22.3°C). The calmest conditions typically occur in September with average wave heights of 1.7m and wave periods of 8.0s. The most comfortable wave conditions are in September 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 September to November, 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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