Dive Site: Nudi Falls

About Nudi Falls

Nudi Falls is a renowned macro dive site located on the mainland side of the Lembeh Strait, a narrow channel between mainland Sulawesi and Lembeh Island in Indonesia. Its unique name stems from the phenomenon where divers' bubbles can dislodge nudibranchs, sending them gently drifting down like a cascade. This site is celebrated for its extraordinary biodiversity, making it a pilgrimage for enthusiasts of intricate marine life. The underwater topography at Nudi Falls features a mini wall that begins in very shallow water, around 1 to 3 meters, and gradually descends along a sandy slope, reaching depths of approximately 15 to 25 meters. The transition from wall to rubble to sandy patches creates diverse microhabitats, perfect for a wide array of small creatures. While the strait's waters can have variable visibility, often around 10 meters, the focus on macro subjects means divers are looking closely at what is directly in front of them, making visibility less critical. The site is a haven for unusual and camouflaged species. Divers frequently encounter a remarkable variety of nudibranchs, several species of frogfish, and elusive ribbon eels. Pygmy seahorses, including the Bargibanti and Pontohi species, are often found nestled within Murcella sea fans or on specific corals. Mantis shrimp and various other crustaceans also thrive in the rubble areas. Diving at Nudi Falls is typically a boat-accessed experience, following the 'Lembeh Style' where divers descend along the slope, covering the site slowly in a zig-zag pattern. Currents can be present, ranging from weak to occasionally stronger, making guide-led dives during slack tide preferable for optimal critter spotting. This patient, observant approach is key to uncovering the site's hidden treasures, which are particularly active during night dives.

Dive site facts: Nudi Falls

Depth

1–25 m

Typical dive

10–22 m, 60 min

Current

Mild to moderate

Visibility

5–20 m

Water temperature

25–29 °C

Entry

Day boat

Level

Intermediate

Dive type

Macro, muck, wall, drift

Night dive

Possible

Region / port

Lembeh Strait, North Sulawesi

Coordinates

4.5345° S, 123.8486° E

Conditions & Currents

Currents at Nudi Falls can be variable, ranging from weak to occasionally strong, largely influenced by the tidal flow of the Lembeh Strait. Dive operators typically aim to schedule dives during slack tide to ensure more favorable conditions with minimal or no current, which is crucial for patiently searching for macro subjects. When currents are present, divers should keep close to the wall for shelter and only venture onto the sandy slope when the guide is comfortable with the flow. Entry is typically via boat, and while surge is generally light, more exposed days can make the site a less ideal choice. Visibility is often around 10 meters, but it can range from 5 to 20 meters; however, this is not usually a limiting factor for macro diving, which focuses on close-up subjects.

Marine life & sighting chances

Nudibranch

common

Frogfish

common

Pygmy Seahorse

common

Ribbon Eel

occasional

Mantis Shrimp

common

Harlequin Shrimp

occasional

Wonderpus Octopus

occasional

Nembrotha Kubaryana

occasional

Jalonus Sp. Nudibranch

occasional

Dotto Nudibranch

occasional

Pontohi Pygmy Seahorse

occasional

Lembeh Sea Dragon

occasional

Crinoid Shrimp

common

Candy Crab

common

Dive profile & how the dive runs

Diving at Nudi Falls begins with a boat entry, typically positioning close to the mainland side of the strait. The descent starts in very shallow water, sometimes as little as 1 meter, along a mini wall that slopes down. Divers follow the 'Lembeh Style' approach, gradually working their way down the sandy slope to a planned maximum depth, which can be around 15 to 22 meters. The initial phase of the dive, covering about 20-25% of the total dive time, focuses on a diagonal swim with any existing current. The main portion of the dive involves slowly ascending and traversing the slope in a zig-zag pattern, meticulously searching for macro critters along the wall, rubble, and sandy patches. Guides are essential for spotting camouflaged subjects. The deepest sections often host pygmy seahorses in sea fans, while shallower areas reveal diverse nudibranchs and crustaceans. The safety stop is typically conducted in the shallower parts of the slope, around 5 meters, which are often rich with marine life, allowing for continued critter viewing until ascent.

Underwater photography

Nudi Falls is a prime destination for macro photography, emphasizing small, intricate subjects. A macro lens (e.g., 60mm or 100/105mm) is essential for capturing the detailed features of nudibranchs, pygmy seahorses, and frogfish. Utilizing a snoot can effectively isolate subjects against the often dark, volcanic sand background, making them 'pop'. Good buoyancy control is paramount to avoid disturbing the silty bottom and to precisely frame subjects without contact. Patience is key, as many critters are masters of camouflage, requiring diligent searching, often with the aid of an experienced local guide. When photographing elusive creatures like the Lembeh sea dragon, approach slowly and respectfully to minimize stress. Night dives offer excellent opportunities to photograph nocturnal species, often with unique behaviors and vibrant colors under artificial light.

Combine with nearby dive sites

• Hairball

  Another famous Lembeh Strait muck dive, known for diverse macro life including frogfish and octopuses.

• Lembeh Strait

  The broader region encompassing Nudi Falls, offering numerous other macro and muck diving sites.

Getting there & logistics

Access to Nudi Falls is primarily through dive resorts located in the Lembeh Strait, which operate day boats for daily excursions. The typical port of entry is Manado International Airport (MDC), which has regular flights from major hubs like Singapore and Jakarta, ensuring year-round accessibility. From Manado, transfers to Lembeh Strait resorts are arranged by operators. Dive trips are almost exclusively resort-based, offering multiple guided dives per day, including night dives. While not specifically mentioned for Nudi Falls, marine park fees are usually included in resort packages for the Lembeh Strait area. Liveaboards rarely visit Lembeh; instead, land-based resorts provide comprehensive services, including dedicated camera facilities and expert guides, making it a specialized destination for macro enthusiasts. A typical stay might range from 5 to 7 days to explore the strait's many sites.

Safety & environment

For diving in the Lembeh Strait, including Nudi Falls, it is highly recommended that divers carry comprehensive dive insurance that covers emergency medical evacuation and recompression chamber treatment. While the exact location of the nearest recompression chamber is not specified, medical evacuation from this somewhat remote region could involve significant time and cost. Site-specific hazards at Nudi Falls include potential low visibility and occasionally stronger currents, requiring divers to maintain situational awareness and follow the guide's instructions closely, especially keeping near the wall when currents pick up. Operators prioritize diving at slack tide for optimal safety and critter viewing. Divers should be proficient in buoyancy control to avoid contact with delicate marine life and stirring up the silty bottom, which can reduce visibility for others. Always adhere to local operator guidance and marine-area rules established for the Lembeh Strait.

Who it suits — and who it doesn't

FAQ

Nudi Falls FAQ

Liveaboards diving Nudi Falls

These liveaboards may visit Nudi Falls on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Naga Biru

Indonesia

12 guests40 m

$273/day

Ecopro Duyung Baru

Indonesia

6 guests27 m

$361/day

Jaya

Indonesia

14 guests23 m

$280/day

Wellenreng

Indonesia

9 guests25 m

$426/day

Komodo Aggressor

Komodo, Indonesia

16 guests29 m

$312/day

Blue Manta

Indonesia

20 guests45 m

$488/day

Mari

Indonesia

14 guests32.2 m

$327/day

Situju7

Komodo, Indonesia

10 guests32.7 m

$362/day

Pindito

Indonesia

16 guests37.79 m

$533/day

Mermaid II

Komodo, Indonesia

18 guests

$354/day

Pearl of Papua

Raja Ampat, Indonesia

14 guests30 m

$303/day

Putri Naga

Komodo, Indonesia

6 guests25 m

$222/day