Bat Island: Big Scare, Gran Susto
The allure of The Big Scare lies primarily in its remarkable inhabitants, the formidable Bull Sharks. These powerful creatures dominate the waters, making for an awe-inspiring encounter. Additionally, lucky divers may have the privilege of encountering other magnificent marine species. From May to November, the peak season, the dive site offers sightings of impressive creatures such as large schools of snappers and Jacks, graceful spotted eagle rays and devil rays, mesmerizing zebra and green eels, and occasional sightings of majestic manta rays, whale sharks, or even orcas.
Undoubtedly, The Big Scare's star attraction is the presence of imposing 12-foot bull sharks serenely patrolling the sandy ocean floor. However, it is paramount that divers possess significant experience and expertise. The currents can be turbulent, necessitating a high level of competence. Competent divers should be capable of swiftly descending and confidently swimming alongside these apex predators. Rest assured, no attacks on divers have ever been reported during the open season. Nevertheless, a safety stop without a line is also a requisite skill.
For those intrigued by the opportunity to dive at The Big Scare, it is vital to note the necessary prerequisites. Advanced and expert divers are recommended due to the profound depths reaching a maximum of 24 meters (79 feet). Moreover, the visibility at this remarkable site averages around 11 meters (36 feet). Fortunately, The Big Scare's close proximity to Provincia Guanacaste, Costa Rica allows for convenient access, making it a must-visit destination for avid divers seeking an unforgettable underwater experience.
Diving Conditions Score for Bat Island: Big Scare, Gran Susto
Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Bat Island: Big Scare, Gran Susto
Depth
24m
Visibility
11m
Experience Level
Weather Conditions for Bat Island: Big Scare, Gran Susto
Wave Height
1.16m
Wind Speed
13 m/s
Water Temp
29.7°C
Visibility
39.04km
Cloud Cover
86%
Wave Period
12.65s
Air Temperature
25.5°C
Precipitation
0 mm
Dive Score Chart for Bat Island: Big Scare, Gran Susto
Best time to dive: 14:00 with score 7.666186046511628/10. Water conditions: Waves 1.14m, Wind 18.9 m/s.Best night dive time: 0:00 with score 7.096456960408684/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Bat Island: Big Scare, Gran Susto 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: 7.7/10
Waves: 1.14m (12.9s), Wind: 18.9 m/s
Score: 7.1/10
Waves: 1.18m, Wind: 7.7 m/s
Seasonal Analysis for Bat Island: Big Scare, Gran SustoAlpha
Historical patterns and best seasons for diving at Bat Island: Big Scare, Gran Susto
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 Bat Island: Big Scare, Gran Susto
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Bat Island: Big Scare, Gran Susto
Ideal Conditions for Bat Island: Big Scare, Gran Susto
Water Temp
26.9°C / 80.4°F
May
Visibility
11.1m / 36.4ft
December
Wave Height
1.7m / 5.6ft
September
Wave Period
8.0s
January
Seasonal Insights for Bat Island: Big Scare, Gran Susto
Bat Island: Big Scare, Gran Susto shows typical northern hemisphere patterns with April being the warmest month (27.6°C) and November the coldest (22.1°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.
Last updated: 1 min. ago - Jun 21, 2026