Te Ava Mo'a

Te Ava Mo’a — “The Sacred Pass” — is a pass drift dive on the southern barrier reef of Raiatea, French Polynesia. The name references the sacred character of Raiatea itself — known in ancient Polynesia as Havai’i, the spiritual homeland from which voyagers departed on the great migrations to Hawaii, New Zealand, and beyond.

Overview

Te Ava Mo’a is the southernmost of the major Raiatea pass dives, situated at the point where the barrier reef curves around the island’s southern tip. The pass channels tidal water between the Pacific Ocean and the Raiatea-Taha’a lagoon, creating the incoming-tide drift conditions that define Polynesian pass diving. The pass descends to 25 metres and the channel is wide enough that divers can position themselves at different depths to observe different tiers of activity. Visibility on incoming tides runs 30–40 metres, with water temperatures of 27–28°C.

What to Expect

Grey reef sharks are the signature species of Te Ava Mo’a, congregating in the pass with typical groups of 20–50 sharks on strong tides. The “sacred” name is apt: the shark behaviour here has a ceremonial quality as they circle and patrol with apparent purpose. Manta rays seasonally visit this southern pass, using the current to feed on the plankton-rich oceanic water flowing in. The pass walls carry black corals below 20 metres and large gorgonian fans that extend into the current. Turtles, eagle rays, and the occasional whale shark (seasonal) have been recorded at this site. The remoteness of the southern reef gives the dive a more adventurous character than the more frequently dived western passes.

Conditions

• Best season: April–November; manta rays most likely June–September
• Visibility: 30–40 m on incoming tide
• Current: Strong (2–4 knots); timing critical
• Water temperature: 27–28°C
• Entry: Boat drift dive; longer boat journey from main Raiatea marina

Tips

The southern location means a longer boat ride from Uturoa (Raiatea’s main town), typically 30–45 minutes. Operators running this pass often combine it with a morning lagoon dive closer to the marina. Carry a full SMB kit for the drift exit. Request information about manta ray frequency when booking — seasonal sightings can be predicted from operator logs.

Sources: Te Moana Diving - Raiatea & Taha’a, Polynesia Paradise - Raiatea Diving, Hemisphere Sub - Raiatea. Last updated 2026-05-30.