Avarua Passage - Rarotonga

Avarua Passage is a real sleeper, often overlooked for the flashier outer reef sites, but we’re always keen to get in here. Dropping down from Edna’s Anchor, you follow the reef edge along a sandy channel, often feeling a gentle push towards the harbour. The coral formations here, particularly the large branching acropora, create countless hideouts. We’ve had some cracking encounters with robust scorpionfish tucked into crevices and watched moray eels peeking out from under plate corals. Our favourite time to dive Avarua Passage is early morning. That’s when you’ll often catch the Marbled Parrotfish in their mating rituals, a swirling, bumping ballet of blues and greens against the sand. Look closely for the smaller stuff too: we’ve spotted dew-drop cowries clinging to their hosts and the tiny Midget Chromis darting among the coral branches. Visibility usually holds around 25-30m, giving you a clear view of the sandy bottom where you might spot a flounder or even a sleeping Humphead Wrasse. This site is a calm, easy dive, perfect for photographers wanting to take their time with macro subjects or anyone who appreciates the subtle beauty of a healthy inner reef.

Location
Rarotonga, Cook Islands, Central & South Pacific
Coordinates
-21.203000, -159.774300
Type
reef

Best Time to Dive in Rarotonga

The warmest water temperatures in Rarotonga occur in January, averaging 26.5°C. The coolest conditions are in December at 26.5°C.

Monthly Water Temperatures

  • January: 26.5°C (air: 24.8°C)
  • February: 26.5°C (air: 25.2°C)
  • March: 26.5°C (air: 25.5°C)
  • April: 26.5°C (air: 25.0°C)
  • May: 26.5°C (air: 24.2°C)
  • June: 26.5°C (air: 22.8°C)
  • July: 26.5°C (air: 22.3°C)
  • August: 26.5°C (air: 21.7°C)
  • September: 26.5°C (air: 22.0°C)
  • October: 26.5°C (air: 22.1°C)
  • November: 26.5°C (air: 22.6°C)
  • December: 26.5°C (air: 24.0°C)

Nearby Dive Sites in Rarotonga

Nearest Dive Centres to Avarua Passage

Marine Life in Rarotonga

Home to 143 recorded species including 102 reef fish, 14 hard corals, 10 sea snails & nudibranchs, 7 sea cucumbers, 2 sea urchins, 2 starfish.

Notable Species

Recommended Packing List for Avarua Passage

Based on average water temperature of 26.5°C.

  • Shorty or Rashguard - warm 26°C water needs minimal exposure protection
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories

Frequently Asked Questions

What is the typical diving depth at Avarua Passage?
The typical diving depth at Avarua Passage reaches a maximum of 16 meters. Divers will explore the sandy passage and reef edge within this depth range, starting from Edna’s Anchor mooring.
What marine life and coral formations can divers expect to see in Avarua Passage?
Divers exploring Avarua Passage can anticipate seeing interesting coral formations and healthy fish life. It's an excellent spot to find scorpion fish, moray eels, and flounders. Notably, this site is also a known parrotfish mating ground.
How challenging is diving in Avarua Passage, particularly concerning currents and overall difficulty?
Diving at Avarua Passage is classified as having an intermediate difficulty level. While specific current details are not provided, divers should be prepared for conditions generally associated with intermediate dive sites.
What is the best time of year to dive Avarua Passage for optimal conditions and marine life encounters?
The provided information does not specify the best time of year to dive Avarua Passage for optimal conditions or marine life encounters. For general guidance on seasonal diving in the Cook Islands, please consult our When to Dive resource.
What scuba diving certifications or experience levels are recommended for diving Avarua Passage?
With an intermediate difficulty rating, Avarua Passage is best suited for certified divers with a comfortable level of experience. Divers should be confident in their skills to navigate the site's conditions effectively.
What are the typical current and sea conditions divers should anticipate when planning a dive at Avarua Passage?
Divers planning a trip to Avarua Passage can expect excellent average visibility of 28 meters. While specific current information is not detailed, the site's intermediate difficulty rating implies that divers should be prepared for conditions typical of such a dive.