Rangiroa tide times

Rangiroa is one of the largest atolls in the world — the lagoon extends approximately 80 kilometres east to west and 30 kilometres north to south, a water body so large that Tahiti could fit inside it. The atoll rim is a narrow rim of coral sand and rock, rising no more than 3 metres above sea level, encircling this enormous lagoon. All the oceanic exchange between the Rangiroa lagoon and the surrounding Pacific happens through two passes: Tiputa Pass on the eastern end and Avatoru Pass further west. The physics of this exchange — enormous volume, narrow bottleneck — produces tidal currents that are among the strongest of any reef pass in French Polynesia.

At spring tides, the current through Tiputa Pass reaches 6 to 8 knots. This is not an exaggeration for effect — at peak flow, the surface of the pass shows standing waves, boils of upwelling water from the bottom, and whirlpools at the channel edges. A swimmer against this current makes no progress. A dive boat running against it at full throttle barely holds position. The current reverses direction four times per day — two flood phases pushing water into the lagoon, two ebb phases draining it — and the transition through slack water, which lasts 15 to 30 minutes at springs, is the window for non-drift diving in the pass.

Spinner dolphins have adopted Tiputa Pass as a daily routine. Each morning on the outgoing tide, a pod of 50 to 200 dolphins surfs the pass current, feeding on fish disoriented by the turbulence and leaping above the standing waves at the pass mouth. The dolphin show in Tiputa is visible from the pass shore in the village of Tiputa, accessible by small boat from Avatoru on the opposite shore. The viewing is best from a boat positioned just inside the lagoon-side entrance of the pass, watching the dolphins work the outgoing current.

Drift diving through Tiputa Pass is the primary marine activity at Rangiroa and is considered one of the world's essential dive sites. The standard profile: enter the water in the blue water just outside the pass mouth on the flood tide, descend to 15 to 25 metres, and allow the current to carry you through the 400-metre pass, across the lagoon-side drop-off, and out into the blue lagoon water. Elapsed time: 20 to 30 minutes. During this transit, the schools of fish in the pass are extraordinary — grey reef shark and blacktip reef shark stacked in the mid-water column, hammerhead shark on the deeper sections (the hammerhead aggregation at Rangiroa is one of the most reliable in French Polynesia), and massive schools of jack and snapper sweeping through the channel.

Avatoru Pass, on the western side of the atoll, carries a smaller volume of water (the pass is narrower than Tiputa) and has a correspondingly gentler current — 2 to 4 knots at springs. The pass has a well-preserved coral community on its inner walls and is more suitable for non-drift reef diving than Tiputa. The village of Avatoru and the airport are on this end of the atoll; most accommodation is on the Avatoru side.

For non-divers, the Blue Lagoon — a shallow section of the outer reef rim on the western atoll, reachable by boat excursion from Avatoru — gives snorkel access to clear, calm water over a sandy and coral bottom with good fish diversity. The boat excursion takes 45 minutes from Avatoru; the site is on the outer rim and accessible in all but rough conditions.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically within plus or minus 45 minutes on timing and 0.2 to 0.3 metres on height — model-derived, not from a local gauge. The local authority for tide information in French Polynesia is the Service Hydrographique et Océanographique de la Marine (SHOM).