Arco Iris, Brumel Island
Arco Iris, located 8km north of Playa Potrero in the stunning Provincia Guanacaste of Costa Rica, is a remarkable dive site that offers an unforgettable underwater experience. With less than 20 minutes of navigation required, this site is easily accessible to divers of all levels, from beginners to advanced and expert divers.
Situated north of Penahuaste or Brumel Island, Arco Iris boasts a captivating rock formation that extends from the northwest face of the island in a northerly direction. One of the highlights of this dive spot is the abundance of white tip reef sharks that can be observed at depths ranging from 10 to 30 meters (33 to 100 feet).
To fully appreciate the beauty of this dive site and to maximize your chances of encountering these majestic creatures, it is essential to have a knowledgeable guide who knows where to find the sharks. With their expertise, you can witness the astonishing sight of sometimes more than 15 sharks gracefully dancing around you.
In addition to the thrilling shark encounters, Arco Iris offers the opportunity to encounter an array of diverse marine life. Various species of rays, including different varieties, can be spotted gliding through the water. The site is also home to large schools of fish, creating a vibrant and dynamic underwater ecosystem.
The underwater topography of Arco Iris adds to its allure, with intricate canyons resembling a labyrinth waiting to be explored. As you navigate through these captivating underwater passages, you may come across additional marine life such as turtles and various species of fish.
With a visibility of 12 meters and a maximum depth of 20 meters, divers can fully appreciate the beauty of Arco Iris. The underwater orientations range from the south towards Brumel in the north, providing divers with diverse underwater landscapes to explore.
Whether you are a beginner looking to embark on your first diving adventure or an experienced diver seeking an exhilarating underwater exploration, Arco Iris in Costa Rica is a dive site that promises to leave you in awe of the wonders of the ocean.
Situated north of Penahuaste or Brumel Island, Arco Iris boasts a captivating rock formation that extends from the northwest face of the island in a northerly direction. One of the highlights of this dive spot is the abundance of white tip reef sharks that can be observed at depths ranging from 10 to 30 meters (33 to 100 feet).
To fully appreciate the beauty of this dive site and to maximize your chances of encountering these majestic creatures, it is essential to have a knowledgeable guide who knows where to find the sharks. With their expertise, you can witness the astonishing sight of sometimes more than 15 sharks gracefully dancing around you.
In addition to the thrilling shark encounters, Arco Iris offers the opportunity to encounter an array of diverse marine life. Various species of rays, including different varieties, can be spotted gliding through the water. The site is also home to large schools of fish, creating a vibrant and dynamic underwater ecosystem.
The underwater topography of Arco Iris adds to its allure, with intricate canyons resembling a labyrinth waiting to be explored. As you navigate through these captivating underwater passages, you may come across additional marine life such as turtles and various species of fish.
With a visibility of 12 meters and a maximum depth of 20 meters, divers can fully appreciate the beauty of Arco Iris. The underwater orientations range from the south towards Brumel in the north, providing divers with diverse underwater landscapes to explore.
Whether you are a beginner looking to embark on your first diving adventure or an experienced diver seeking an exhilarating underwater exploration, Arco Iris in Costa Rica is a dive site that promises to leave you in awe of the wonders of the ocean.
Diving Conditions Score for Arco Iris, Brumel Island
6.8
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Arco Iris, Brumel Island
Depth
20m
Visibility
12m
Experience Level
beginner
advanced
expert
Weather Conditions for Arco Iris, Brumel Island
Wave Height
0.88m
Wind Speed
9.3 m/s
Water Temp
30.3°C
Visibility
4.86km
Cloud Cover
100%
Wave Period
12.05s
Air Temperature
25°C
Precipitation
1.9 mm
Detailed 7-Day Diving Forecast for Arco Iris, Brumel Island
Alpha
Dive Score Chart for Arco Iris, Brumel Island
Best time to dive: 6:00 with score 8.62111111111111/10. Water conditions: Waves 0.88m, Wind 2.4 m/s.Best night dive time: 4:00 with score 7.92403969571231/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Arco Iris, Brumel Island: 06:00
Sunset at Arco Iris, Brumel Island: 18:00
Optimal diving conditions at Arco Iris, Brumel Island 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
6:00Score: 8.6/10
Waves: 0.88m (12s), Wind: 2.4 m/s
Best Night
4:00Score: 7.9/10
Waves: 0.88m, Wind: 4.4 m/s
Seasonal Analysis for Arco Iris, Brumel IslandAlpha
Historical patterns and best seasons for diving at Arco Iris, Brumel Island
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 Arco Iris, Brumel Island
Winter
Avg. Score: 9.7/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Arco Iris, Brumel Island
January
Score: 9.7
December
Score: 9.7
February
Score: 9.6
Ideal Conditions for Arco Iris, Brumel Island
Water Temp
26.9°C / 80.4°F
March
Visibility
13.1m / 43.0ft
December
Wave Height
1.1m / 3.6ft
November
Wave Period
8.0s
January
Seasonal Insights for Arco Iris, Brumel Island
Arco Iris, Brumel Island shows typical northern hemisphere patterns with April being the warmest month (27.2°C) and November the coldest (21.9°C). The calmest conditions typically occur in November with average wave heights of 1.1m 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 0.1mm 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 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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