Manta Ridge

Raja Ampat Islands, Mansuar Island, West Papua, Indonesia18 m maxadvanced

Conditions & tides

Channel site — tidal current funnels through here and can run fast, changing quickly with the tide. It is usually strongest around mid-tide and eases near the slack windows below. Dive with a local operator who knows the timing.

Manta RidgeMansuar Island

Good · 5/5

conditions visualisation

Good5/5

Calm and diveable right now — best window today 6 AM–7 PM.

Wind4 kn WSW

Current~0.2 kn W · model

Swell

0.1 m · 8s · ENE

Water

30 °C

Max depth

18 m

Conditions through the day

5 AM8 PM

Calmest current near slack — 11:00 & 00:00 local

Sunrise 05:57 · Sunset 18:05 local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.0 m — the component of the swell aimed at this site’s exposed face. Strong-current reef: plan a drift and enter near the slack windows above. Current is a regional model value (Copernicus, ~9 km grid) — a guide to the area, not a precise reef measurement. Imagery © Esri · not depth or visibility.

Scored by DiveConnect's site-physics model

Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.

Dived here today? How were conditions vs. what we showed?

About this site

Manta Ridge, located at Arborek in Raja Ampat, Indonesia, is a deeper, high-energy cleaning station reef where resident reef manta rays (Manta alfredi) gather to be cleaned by wrasses. It is one of two principal manta cleaning stations in the region and is regarded as a more dramatic alternative to the shallower Manta Sandy site in Dampier Strait.

The site reaches a maximum depth of 18 m and is built around a ridge formation. Mantas are present year-round but concentrate most reliably between November and April, with the broader active season running October through April or May.

Beyond mantas, the ridge attracts blue-spotted trevally, triggerfish, fusiliers, barracuda, butterflyfish, and hammerhead sharks, along with mandarin fish and nocturnal creatures during night dives. Wrasses work the cleaning station alongside the mantas.

Read the full guide

Manta Ridge is an advanced dive site. Strong currents run frequently, particularly during full or new moon phases and when tides are high, and reef hooks are required equipment; guides will assist divers unfamiliar with their use. Inexperienced buoyancy control in these conditions risks coral damage, so the site is matched to divers whose experience level suits the conditions on the day. Visibility is generally good. Entry is by boat.

AI-written site guide