Best Places to Dive With Manta Rays: 13 Sites and Their Seasons

Reef manta or oceanic manta: which one will you meet?

Most manta dives are with the reef manta (Mobula alfredi), which the Manta Trust describes as reaching a wingspan of up to 4 m and living resident to certain reefs and atolls in shallow or coastal water. The oceanic manta (Mobula birostris) reaches about 7 m, lives in deeper water out in the open ocean. Divers meet it at places such as the Socorro islands off Mexico and Isla de la Plata off Ecuador.

Telling them apart underwater is a rule of thumb, not a certainty. The Manta Trust gives the reef manta a Y-shaped shoulder pattern with spots usually between the gill slits, and the oceanic manta a T-shaped pattern with spots rarely found there. New Zealand's Department of Conservation adds that only the oceanic manta has a vestigial sting at the base of the tail.

The species matters for planning. Reef manta sites work like appointments: the same animals return to the same cleaning stations, so a good site gives sightings in most months. Oceanic manta sites are seasonal and less predictable. If you are choosing by month rather than by animal, our month-by-month dive calendar covers whale sharks, hammerheads and water temperatures as well.

Best places to dive with manta rays: sites and seasons

The table lists sites where a research group, park authority or long-running operator states when mantas are there. Months are the window with the most sightings, not a guarantee, and where two sources give different months both are shown.

Two patterns stand out. Cleaning stations (Manta Point, Mawan, Mi'l Channel, Lighthouse Bommie) give the steadiest encounters, because mantas hover there to be cleaned and divers can wait on the bottom. Feeding sites follow plankton, so numbers swing much more: Hanifaru Bay averaged 32 mantas per survey day in its 2022 season, and 212 on its best day.

Where the season is firm and where sources disagree

Research and operator calendars do not always match, and the gap is worth knowing before you book a single week. At Nusa Penida, a study of 624 identified reef mantas found them present year round, with an approximately twofold increase in sightings at Manta Point in May, when courtship also peaks. PADI's calendar instead calls October the end of peak manta season there. The paper's numbers are the stronger evidence; our Nusa Penida diving guide covers the sites and the sunfish months.

Komodo has the clearest seasonal split. The 2022 PeerJ study, built on 1,085 individuals photographed between 2013 and 2018, found more visits to the central sites (Karang Makassar and Mawan) during the northwest monsoon, November to April, and more at Manta Alley in the south during the southeast monsoon, May to October. The central sites had fewer sightings in August and September. Wind matters too: the authors note that December to February limits access to the north and centre, and June to August limits Manta Alley.

In the Maldives the Manta Trust's 2022 Baa Atoll report recorded 5,053 sightings of 596 reef mantas in Hanifaru Bay, and all but seven fell between May and November, with August the busiest month. The Maldives Manta Conservation Programme gives the Hanifaru window as May to December and lists other atolls for the northeast monsoon, so a December to April trip should aim at Rasfari or Rangali Kandu instead.

Raja Ampat shows how thin operator calendars can be. The 2024 tracking study describes reef mantas migrating seasonally between aggregation sites, driven by monsoonal prey, but names no peak months. One resort's season page says mantas are more likely in the October to April dry season and, a few lines later, more commonly spotted in the June to September wet season. Treat any single Raja Ampat manta month with caution and pick the region (Dampier Strait, Misool or the north) first.

Oceanic sites vary more. Nautilus Liveaboards runs Socorro from November to July, while PADI's calendar calls May the end of the season. At Isla de la Plata, Oregon State University's summary of the 2022 study says mantas gather in August and September, and PADI lists June to September for Machalilla National Park. In Tofo, the problem is numbers, not months: Marine Megafauna Foundation surveys from 2003 to 2023 showed a 99% decline in reef manta sightings and a 92.5% decline in oceanic manta sightings.

Manta rays in October and November: where to go

For an October or November trip with a good chance of mantas, the strongest picks are Raja Ampat, Komodo, Yap and Palau, plus Socorro if you can wait for November. Each is entering its better months then, and two of them add reliable reef sharks.

Raja Ampat's calm season starts in October, and the Raja Ampat Biodiversity Eco Resort describes October to April as the dry season with visibility that often exceeds 30 m (100 ft). Komodo's central cleaning stations pick up as the northwest monsoon begins in November. In Yap, the Mi'l Channel factsheet reports 5-10 mantas per survey from November to April against 1-3 from May to October, so late November is the safer half of the window. At Palau's German Channel, reef mantas have been seen feeding from November to January. Nautilus starts its Socorro season in November, so October is out.

Hanifaru Bay is still open in October and November but past its August peak; PADI calls November the last chance. Nusa Penida and Kona work in any month. Lady Elliot Island, Isla de la Plata and Yap's Goofnuw Channel are out of their best months by then.

For reef sharks on the same trip, Palau and Yap are the sourced options. At German Channel, dive guides record whitetip reef sharks resting on the sand on about 90% of dives and groups of up to 10 adult grey reef sharks on about 80%, all year. In Yap's Mi'l Channel, aggregations of 10-30 grey reef sharks are seen on almost every dive from late northern summer into autumn. Nautilus lists whitetip reef, silky and Galápagos sharks at Socorro but gives no months for them. More detail on Raja Ampat's regions and currents is in our Raja Ampat diving guide.

Night dives, snorkel-only sites and liveaboard trips

Three formats need different preparation. Kona's manta encounter happens after dark: Hawaii's tourism authority describes mantas feeding on microscopic plankton in illuminated water off the Kona and Keauhou coast, and points visitors to night snorkel and dive tours. Hawaii's DLNR estimated 60-70 viewing vessels at Makako Bay (Garden Eel Cove) and Keauhou Bay when it began drafting rules in 2022, so expect company. Our night diving basics cover lights, signals and buddy contact before you go.

Hanifaru Bay is a surface encounter. The Manta Trust lists tourist and boat limits, scuba and fishing bans and scheduled entry days for liveaboards and resort boats, and guides need divemaster and first aid qualifications plus an exam. At Ningaloo, Australia's Coral Coast describes dedicated manta swim tours from Coral Bay all year.

Socorro and the far reaches of Raja Ampat are liveaboard trips. Socorro means a 24-hour crossing each way from Cabo San Lucas, and Nautilus warns that several dives may not suit less experienced divers. If it would be your first week on a boat, read our first liveaboard guide before booking.

How to behave around manta rays

The Manta Trust's code for swimmers and divers comes down to distance and position. Its main rules:

• Enter the water quietly, no closer than 10 m (33 ft) from the manta.
• Do not approach closer than 3 m (10 ft). Stay still and let the manta come to you.
• Approach from the side so the animal has a clear path ahead, and never chase it.
• Do not touch a manta. The Nusa Penida code adds that touching removes the mucus layer that protects it against infection.
• On scuba, stay at the side of the cleaning station and do not swim onto the main cleaning area.
• Keep low and hover close to the seabed without damaging the reef, and do not block a manta's path overhead.
• Follow the local rules of the site you are visiting.

Are manta rays endangered, and do local rules differ?

Both species are on the IUCN Red List: the reef manta as Vulnerable and the oceanic manta as Endangered, according to the 2022 assessments cited in the Tofo study. The same paper notes that mobulid rays have low population growth rates, which puts them among the sharks and rays most vulnerable to overfishing. Its authors name fisheries mortality as a likely driver of the declines they measured, which is why the sighting rate at one site can fall for twenty years even when the season stays the same.

The details of the codes differ by site. The Manta Trust's ten steps do not mention cameras, while the Nusa Penida code bans flash photography because it disturbs the animals, and asks divers to stay 3 m from a manta at a cleaning station and 10 m from one that is not yet settled. In Kona the light is part of the encounter. The Manta Pacific Research Foundation describes its tour participant guidelines as voluntary, though it says most operators enforce them, and in October 2022 DLNR said no laws or rules regulated manta diving or viewing there. Ask your operator which rules it follows before the briefing.