Dive Site: Mbili Passage

About Mbili Passage

Mbili Passage is a captivating dive site located within the New Georgia Island group in the Western Province of the Solomon Islands. This region is celebrated for its pristine marine environments, making Mbili Passage a prime example of the rich biodiversity found in the Coral Triangle. The site presents a diverse underwater topography, ranging from healthy coral gardens to deeper reef sections, and is occasionally influenced by currents that attract larger marine life. Its unique position offers a mix of experiences, from exploring vibrant reef ecosystems to uncovering remnants of historical events. The topography of Mbili Passage typically features a channel or cut through reef structures, where the flow of water nurtures extensive hard and soft coral growth. Depths can vary significantly, accommodating different dive profiles, but the most biodiverse areas are generally found along the reef edges and where currents bring in nutrients. While the passage itself is a highlight, the surrounding areas contribute to the overall richness, with opportunities to encounter diverse reef fish, invertebrates, and occasional pelagic species. Marine life at Mbili Passage is abundant and varied, characteristic of the Solomon Islands' reputation as a marine biodiversity hotspot. Divers frequently observe colorful reef fish, various invertebrate species, and hard corals, which are notably healthy. The currents present can attract larger pelagic species, adding an exciting dimension to the dive. The conditions, including warm water temperatures and generally good visibility, make for comfortable diving throughout the year. Diving Mbili Passage often involves drift diving, leveraging the currents to explore the expansive reef systems. The practical dive experience is enhanced by the remote and untouched nature of the area, ensuring a sense of exclusivity. Liveaboard operators frequently visit Mbili Passage as part of broader itineraries exploring the Western Province, allowing di

Dive site facts: Mbili Passage

Depth

5–30 m

Typical dive

15–25 m, 50–60 min

Current

Mild to moderate

Visibility

12–36 m

Water temperature

28–30°C

Entry

Tender / boat entry

Level

Open Water Diver, current experience helpful

Dive type

Reef, drift, pelagic

Night dive

Possible

Region / port

Western Province, New Georgia

Coordinates

-8.4, 157.4333

Conditions & Currents

Currents at Mbili Passage are typically mild to moderate, characteristic of many passages in the Solomon Islands where water movement nurtures rich coral growth. Dive operators plan excursions to align with the tides, often conducting drift dives to maximize the experience and minimize strenuous swimming against the current. While stronger currents can occur, especially in more exposed areas or during specific tidal phases, inside the passage, divers can generally expect a manageable flow that enhances marine life viewing. Visibility in the region is consistently excellent, usually ranging from 12 to 36 meters (40-120 feet), with minimal impact from currents. Water temperatures remain warm throughout the year, removing concerns about thermoclines. Entry and exit strategies are typically facilitated by tenders, ensuring smooth transitions even in the presence of mild currents, and the gen

Marine life & sighting chances

Reef fish

common

Hard corals

common

Soft corals

common

Barracuda

occasional

Jacks

occasional

Mackerel

occasional

Sharks

occasional

Tunas

occasional

Hawksbill turtle

occasional

Reef squid

occasional

Nudibranchs

occasional

Pygmy seahorses

occasional

Dive profile & how the dive runs

A typical dive at Mbili Passage often begins with a boat entry, allowing divers to descend directly into the main channel or along a prominent reef wall. You will usually drift with the current, which carries you along vibrant coral gardens and past various reef formations. The depth can range from shallow reef tops at 5-10 meters to deeper sections reaching 25-30 meters, where larger pelagic species might be encountered. Keep an eye out for schools of fish and the occasional shark or barracuda that cruise through the passage. The dive progresses, allowing for leisurely exploration of the diverse marine life thriving in the current-rich environment. Towards the end of the dive, you will typically ascend gradually along a coral slope, making your safety stop in the shallower, light-filled areas of the reef. The dive boat will then pick you up at your exit point, providing a comfortable return.

Underwater photography

Mbili Passage offers excellent opportunities for both wide-angle and macro photography, depending on your focus. For wide-angle shots, consider capturing the expansive coral formations, schools of fish, and the general reef landscape, especially when currents bring in pelagics. A wide-angle lens would be ideal here. For macro enthusiasts, the healthy corals and diverse invertebrate life warrant a macro lens to capture nudibranchs, pygmy seahorses, and various reef critters. Due to potential currents, precise buoyancy control is crucial to avoid stirring up sediment and to maintain stable shots. While natural light is often sufficient in the excellent visibility, strobes can enhance colors, particularly in deeper sections or for highlighting macro subjects. Be mindful of your finning to protect the delicate coral ecosystems.

Combine with nearby dive sites

• Leru Cut

  A stunning passage known for dramatic light effects.

• Custom House Reef

  A diverse reef offering varied marine encounters.

• Mirror Pond

  A unique cavern dive with atmospheric light penetration.

• Uepi Point

  Known for its rich biodiversity and current-fed reefs.

Getting there & logistics

Diving Mbili Passage is primarily facilitated through liveaboard operations, as it is located in the remote Western Province of the Solomon Islands. The main international airport for arrival is Honiara International Airport (HIR) on Guadalcanal. From Honiara, divers typically transfer to a liveaboard vessel, which serves as the primary mode of transportation and accommodation for the duration of the trip. Liveaboard itineraries exploring the Western Province often range from 7 to 14 days, combining Mbili Passage with other renowned sites like Leru Cut and Mirror Pond. There are no specific entry fees for Mbili Passage itself, but national park fees or community levies may be incorporated into liveaboard package costs. It is advisable to book liveaboard trips well in advance due to limited availability.

Safety & environment

Diving in the Solomon Islands, including Mbili Passage, requires careful planning due to its remote location. The nearest recompression chamber is in Honiara, but evacuation from the Western Province can be complex and time-consuming, potentially involving multiple stages of transport. Therefore, comprehensive dive insurance that covers emergency medical treatment and evacuation is essential for all divers. Site-specific hazards at Mbili Passage include currents, which, while usually manageable, can occasionally be strong; divers should have appropriate experience or be guided by experienced professionals. Always follow your dive guide's instructions, maintain good buoyancy, and avoid touching or disturbing marine life to preserve the pristine environment. Pre-dive briefings will cover specific entry and exit procedures and any immediate environmental considerations.

Who it suits — and who it doesn't

FAQ

Mbili Passage FAQ

Liveaboards diving Mbili Passage

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

Solomons Master

Solomon Islands

16 guests

$401/day

Emperor Bilikiki

Solomon Islands

20 guests38 m

$569/day

Pacific Master

Solomon Islands

20 guests30 m

$268/day