Atnam
Dive enthusiasts at this site may be fortunate enough to spot an array of magnificent creatures including leopard sharks, giant humpback parrotfish, mantas, whale sharks, and leopard eagle rays. The underwater world here is home to a diverse range of marine life, providing an unforgettable encounter with these remarkable species.
Experience the breathtaking wonder of Atnam, a dive site boasting an impressive depth range from 20 to 65 meters. Its unrivaled landscape is renowned as one of Nosy be's most beautiful spots. Dive into a canyon teeming with giant gorgonians, creating a truly magical underwater scene. Please note that diving at this site is recommended during low tide or when the tide is at a small coefficient of rising. This aspect adds to the uniqueness of diving in Madagascar. Prepare to encounter the magnificent and enormous giant gorgonians that make this area truly special.
With visibility up to 19 meters and a maximum depth of 34 meters, divers of all levels, from beginners to advanced, will find enjoyment exploring this captivating underwater world. Atnam is conveniently located in the Diana region of the Antsiranana Province, making it easily accessible for divers seeking an extraordinary experience in Madagascar.
Immerse yourself in the wonders of Nosy be's remarkable dive site at Atnam. Prepare for an awe-inspiring adventure and explore the depths of this extraordinary underwater paradise.
Diving Conditions Score for Atnam
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Atnam
Depth
34m
Visibility
19m
Experience Level
Weather Conditions for Atnam
Wave Height
0.4m
Wind Speed
16.3 m/s
Water Temp
27.9°C
Visibility
45.56km
Cloud Cover
5%
Wave Period
6.3s
Air Temperature
25.3°C
Precipitation
0 mm
Dive Score Chart for Atnam
Best time to dive: 7:00 with score 8.900651515151514/10. Water conditions: Waves 0.44m, Wind 8.1 m/s.Best night dive time: 20:00 with score 8.920646728971963/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Atnam 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: 8.9/10
Waves: 0.44m (5.35s), Wind: 1.5 m/s
Score: 8.9/10
Waves: 0.46m (5.95s), Wind: 7.6 m/s
Score: 8.9/10
Waves: 0.44m, Wind: 8.1 m/s
Seasonal Analysis for AtnamAlpha
Historical patterns and best seasons for diving at Atnam
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 Atnam
Summer
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Atnam
Ideal Conditions for Atnam
Water Temp
26.7°C / 80.1°F
April
Visibility
11.8m / 38.7ft
July
Wave Height
1.6m / 5.2ft
March
Wave Period
8.0s
January
Seasonal Insights for Atnam
Atnam follows southern hemisphere patterns with April being the warmest month (26.7°C) and October the coldest (21.8°C). The calmest conditions typically occur in March with average wave heights of 1.6m and wave periods of 8.0s. The most comfortable wave conditions are in March 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). July is usually the driest month with 0.2mm of precipitation. For beginners, the best time to visit would be during March to May, 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 28, 2026