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Atnam

Discover one of the most captivating dive sites in Nosy be, Madagascar. This awe-inspiring location boasts a stunning landscape that will leave you in awe. While it may not be teeming with fish, it offers a unique and mesmerizing diving experience like no other.

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

8.4
Very Good

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

beginner
advanced

Weather Conditions for Atnam

Wave Height

0.6m

Wind Speed

18.4 m/s

Water Temp

28.2°C

Visibility

52.52km

Cloud Cover

0%

Wave Period

7.1s

Air Temperature

26.5°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Atnam
Alpha

Dive Score Chart for Atnam

Best time to dive: 7:00 with score 9.06247311827957/10. Water conditions: Waves 0.72m, Wind 3.1 m/s.Best night dive time: 19:00 with score 8.25229282700422/10.

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

Sunrise at Atnam: 06:00
Sunset at Atnam: 18:00

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.

🌞
Best Overall
7:00

Score: 9.1/10
Waves: 0.72m (6.2s), Wind: 3.1 m/s

🌙
Best Night
19:00

Score: 8.3/10
Waves: 0.56m, Wind: 16 m/s

Seasonal Analysis for Atnam
Alpha

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

Avg. Score: 10.0/10

Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.

Best Months for Atnam

May
Score: 10.0
June
Score: 10.0
July
Score: 10.0

Ideal Conditions for Atnam

Water Temp

Thermometer Emoji

21.3°C / 70.3°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

May

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Atnam

Atnam follows southern hemisphere patterns with June being the warmest month (21.3°C) and December the coldest (17.3°C). The calmest conditions typically occur in January with average wave heights of 0.2m and wave periods of 8.0s. The most comfortable wave conditions are in January 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 January to March, 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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