Dive Site: Manta Bay

About Manta Bay

Manta Bay, situated on the south side of Nusa Penida, is renowned for its consistent sightings of manta rays. Unlike the nearby Manta Point, Manta Bay does not feature a dedicated cleaning station, yet mantas are frequently observed playing and feeding in its shallow waters. The site encompasses multiple bays, allowing for varied exploration. The topography of Manta Bay features a sandy bottom that gently slopes from a depth of 5 meters down to 12 meters, eventually reaching depths of up to 30 meters. Most of the manta activity, however, occurs in the very shallow range of 1 to 6 meters, making it accessible for both divers and snorkelers. The surrounding underwater environment includes sandy areas and rocky features. While manta rays are the primary draw and are present year-round, occasional sightings of green sea turtles and sharks also enrich the dive experience. The bay's location, though often calmer than Manta Point, can still experience swell due to its exposed position, necessitating careful dive planning. Diving at Manta Bay is generally suitable for all levels, particularly due to the shallow depth where mantas are typically encountered. Dive trips usually depart from Sanur on Bali's southeast coast, with a speedboat journey of approximately 45 to 60 minutes. It is often combined with other dive sites around Nusa Penida or Nusa Lembongan.

Dive site facts: Manta Bay

Depth

2-30 m

Typical dive

1-12 m

Current

Mild to moderate swell

Visibility

10-15 m

Water temperature

26-28°C (surface), 18-20°C (thermoclines)

Entry

Boat / negative entry

Level

All Levels

Dive type

Reef, pelagic, shallow encounters

Region / port

Nusa Penida, Bali

Coordinates

8.7610° S, 115.4590° E

Conditions & Currents

Manta Bay generally experiences milder conditions compared to other Nusa Penida sites, though swell can be a notable factor, particularly in exposed areas. While strong currents are less common, the site is not entirely immune to ocean movements. Divers should be prepared for varying surge, especially near the surface, which can impact buoyancy control. Visibility typically ranges from 10 to 15 meters, but can be influenced by plankton-rich waters, which, while reducing clarity, contribute to the presence of filter-feeding mantas. Water temperature usually hovers around 26-28°C at the surface, but can drop to 18-20°C during thermoclines, especially in the deeper sections from July to October. Experienced dive operators are crucial for assessing daily conditions and ensuring a safe and enjoyable dive.

Marine life & sighting chances

Manta Ray

Year-round · common

Green Sea Turtle

occasional

Reef Shark

occasional

Dive profile & how the dive runs

Entry at Manta Bay is typically a negative or controlled backward roll from the speedboat, allowing for immediate descent. The dive primarily focuses on the shallow sandy bottom area, ranging from 1 to 12 meters, where manta rays frequently congregate. Divers often maintain this shallow profile, observing mantas as they cruise or play. The site features a gently sloping sandy bottom, with some rocky outcrops. Depending on the guide's assessment and diver experience, the dive may extend to depths of 30 meters to explore the deeper sandy areas. The turnaround point is often determined by air consumption and current conditions. Safety stops are conducted in the protected shallower waters of the bay, typically around 5 meters, before a surface interval.

Underwater photography

For capturing the majestic manta rays at Manta Bay, a wide-angle lens is essential to frame their impressive size and elegant movements. Given the frequent shallow encounters, natural light photography is often sufficient, especially with mantas cruising between 1 and 6 meters. If deeper areas or potentially lower visibility are anticipated, strobes can help bring out color and detail. Maintain good buoyancy control to avoid disturbing the sandy bottom and to allow for smooth, unobtrusive movement around these gentle giants. Always give mantas ample space and avoid chasing or touching them to ensure respectful interactions and capture natural behavior.

Combine with nearby dive sites

• Manta Point

  Another famous site for manta ray cleaning stations, often combined with Manta Bay.

• Crystal Bay

  Known for Mola Mola sightings during season and vibrant reef life, frequently paired with manta dives.

• Toya Pakeh Drop-Off

  A drift dive site with healthy coral gardens between Nusa Penida and Nusa Lembongan.

• Sidem

  A drift dive site along a coral slope with diverse fish species.

• Jepun Wreck

  The Jepun Wreck is a dive site nestled in Padang Bai, Bali, a coastal town offering a diverse range of underwater experiences.

Getting there & logistics

Access to Manta Bay is primarily via daily speedboat trips departing from Sanur on Bali's southeast coast. The boat journey typically takes 45 to 60 minutes. Most dive operators in Bali, especially those around Sanur, offer day trips that combine Manta Bay with other sites like Manta Point or Crystal Bay, usually including two to three dives. While it's possible to stay on Nusa Penida or Nusa Lembongan to reduce travel time, day trips from Bali are common and convenient. Dive packages often include transfers from accommodations, equipment rental, and lunch. No specific permits or park fees beyond standard dive trip costs are mentioned for this site.

Safety & environment

The nearest recompression chamber is located in Denpasar, Bali. In the event of a dive emergency requiring chamber treatment, evacuation would involve a speedboat transfer back to Bali, followed by land transport, which could take several hours. Comprehensive dive insurance is therefore highly recommended. While Manta Bay is generally considered suitable for all levels, divers must be aware of potential surge, particularly at the surface, and be comfortable with boat entries and exits. Maintaining excellent buoyancy control is crucial to avoid contact with the marine environment and ensure respectful interaction with manta rays. Always follow your dive guide's instructions and maintain a safe distance from marine life.

Who it suits — and who it doesn't

FAQ

Manta Bay FAQ

Liveaboards diving Manta Bay

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

Naga Biru

Indonesia

12 guests40 m

$274/day

Ilike

Indonesia

16 guests40 m

$298/day

Mermaid I

Alor

15 guests28 m

$372/day

Sunshine Liveaboard

Indonesia

10 guests31 m

$191/day

Tiare Cruise

Indonesia

12 guests36.5 m

$419/day