Dive Site: Radama Islands

About Radama Islands

The Radama Islands, an archipelago off Madagascar's western coast, represent a remote and largely untouched diving destination. This region is celebrated for its pristine marine environment, offering a unique blend of vibrant coral ecosystems and encounters with large pelagic species. Divers can expect to explore healthy reefs teeming with diverse fish life, where the underwater landscape transitions from colorful shallow slopes to deeper areas favored by sharks and rays. The topography of Radama Islands dive sites often features extensive coral slopes adorned with soft corals in brilliant oranges, reds, and purples. These vibrant habitats provide shelter for numerous small reef creatures, making them particularly rewarding for macro photography enthusiasts. Depths generally range, accommodating various experience levels, though some sites can be subject to currents, enhancing the chances of spotting pelagic marine life. The archipelago is especially renowned for its whale shark encounters, particularly between September and November when these gentle giants are often present. Divers also frequently observe manta rays, sea turtles, and various shark species, including white-tip and black-tip reef sharks. The dry season from April to December offers optimal diving conditions with calm seas and excellent visibility, though unique underwater experiences can be found year-round. Liveaboard trips are the primary way to experience the Radama Islands, providing access to sites inaccessible to day-trippers. These expeditions ensure divers can fully immerse themselves in the remote beauty and rich biodiversity of this exceptional Malagasy diving destination, with knowledgeable guides enhancing both safety and the overall dive experience.

Dive site facts: Radama Islands

Depth

5–40 m

Current

Variable, mild to strong

Visibility

20–30 m

Water temperature

25–28°C

Entry

Liveaboard tender

Level

All levels, advanced for some sites

Dive type

Coral reefs, pelagic encounters, macro

Night dive

Possible

Region / port

Nosy Be / Western Madagascar

Coordinates

-14.725, 47.64

Conditions & Currents

Currents around the Radama Islands can vary depending on the specific dive site and tidal conditions. While some areas offer gentle drifts, others may experience stronger currents, particularly in deeper sections or open ocean locations. Dive operators typically assess conditions daily and guide divers to suitable sites, often recommending drift diving techniques where currents are present.

Marine life & sighting chances

Whale shark

September-November · occasional

Manta ray

occasional

White-tip reef shark

common

Black-tip reef shark

common

Sea turtle

common

Butterflyfish

common

Angelfish

common

Parrotfish

common

Barracuda

common

Moray eel

common

Nudibranch

common

Seahorse

occasional

Trevally

common

Hammerhead shark

occasional

Dive profile & how the dive runs

Dives in the Radama Islands typically begin with a tender boat transfer from your liveaboard to the dive site. Entry is usually a backward roll or giant stride into the calm waters near the reef. Divers often descend along a vibrant coral slope, starting at shallower depths of around 5-10 meters, gradually exploring deeper sections that can reach 30-40 meters. The route is often guided by the reef's contours, following walls or pinnacles rich in soft corals and schooling fish. Turnaround points are determined by air consumption or dive computer limits, ensuring ample time for an unhurried ascent. Safety stops are conducted at 5 meters for at least three minutes, often near shallow reef sections where macro life can be observed. Exits are back onto the tender boat.

Underwater photography

The Radama Islands offer diverse photography opportunities, from wide-angle shots of vibrant coral slopes and pelagic encounters to macro photography of cryptic reef creatures. For wide-angle, a rectilinear wide-angle lens (e.g., 14-24mm equivalent) is ideal for capturing the expansive soft coral gardens and schools of fish. When whale sharks or mantas are present, a fisheye lens can create dramatic, immersive images. For macro subjects like nudibranchs and seahorses, a 60mm or 100mm macro lens is essential. Two strobes are highly recommended to bring out the true colors of the corals and marine life, especially in deeper sections. Pay close attention to buoyancy to avoid disturbing the fragile coral ecosystems and maintain a respectful distance from large animals like whale sharks, prioritizing their natural behavior over your shot.

Combine with nearby dive sites

• Nosy Iranja Drop-off

  Known for vibrant coral reefs and abundant marine life.

• Nosy Tanikely Marine Reserve

  A protected area with amazing corals and frequent turtle sightings.

• Nosy Komba Reef

  Accessible by speedboat, offering diverse marine habitats.

• Nosy Mitsio Pinnacles

  Remote sites in the Mitsio Archipelago with impressive underwater formations.

Getting there & logistics

Access to the Radama Islands primarily involves flying into Ivato International Airport (TNR) near Antananarivo, the capital of Madagascar. From there, connecting flights are typically taken to Fascene Airport (NOS) in Nosy Be. Liveaboard trips to the Radama Archipelago depart from Nosy Be, offering multi-day itineraries, usually around 5 nights, to explore these remote dive sites. These liveaboards provide comprehensive packages, covering accommodation, diving, and meals. There are typically no specific park fees mentioned for the Radama Archipelago, but it's advisable to confirm with your liveaboard operator. Trips to Radama are often combined with other archipelagos like Mitsio, offering an extended exploration of Madagascar's western coast.

Safety & environment

For diving in the Radama Islands, divers should ensure they have comprehensive dive insurance, as recompression chamber facilities are not immediately available in the remote archipelago. The nearest recompression chamber is likely in Nosy Be or a larger mainland city, making evacuation potentially complex and time-consuming. Divers should be proficient in their skills, especially with varying currents that can be encountered at some sites. Always dive within your training and comfort limits, follow your dive guide's instructions, and maintain good buoyancy control to protect the fragile coral reefs. Staying hydrated is crucial, and using reef-safe sunscreen is recommended to protect both yourself and the marine environment. In case of emergency, the liveaboard crew is trained for initial response and communication for evacuation.

Who it suits — and who it doesn't

FAQ

Radama Islands FAQ