Nha Trang
Nha Trang's diving is built around Hon Mun, Vietnam's first marine protected area, and the reef there collapsed. The Nha Trang Bay Management Board recorded hard coral cover on the northeast and southwest of Hon Mun falling from 53.7% in 2015 to 32.6% in 2022, and on the southeast and northwest from 52.2% to 11.2% over the same period. A June 2022 survey found losses above 70% at numerous locations. Typhoon Damrey (2017) and Typhoon Rai (2021) did the physical damage; crown-of-thorns outbreaks, illegal fishing, dredging, anchoring and weak enforcement did the rest. Khanh Hoa province suspended swimming, diving and boat tourism in the strictly protected core around Hon Mun from late June 2022, and as of 2026 that core zone is still closed while restoration and quarterly monitoring continue. Diving carries on in designated zones elsewhere in Nha Trang Bay. Set expectations accordingly: this is Vietnam's busiest and cheapest training area, running a very high volume of Open Water courses and try-dives on shallow, worked-over sites. Visibility is typically 10–15m and often less, currents are mild, and there are no reliable big animals. What it does have is genuinely good macro — nudibranchs by the dozen, ghost pipefish, seahorses and frogfish — and the swim-throughs at Madonna Rock, which are enjoyable on their own terms. A fine place to learn cheaply; a poor place to fly in for the diving alone.
What makes it special
- Madonna Rock's tunnels, caverns and swim-throughs at 5–25m, filled with glassfish and holding a well-known resident grouper
- Consistent macro on the rubble and seagrass — nudibranchs, ornate ghost pipefish, seahorses and frogfish on most dives
- Vietnam's cheapest and highest-volume certification market: Open Water courses commonly $330–450
- Hon Mun was Vietnam's first marine protected area (established 2001) and is now an active coral-restoration site, including Biorock trials and a reef-building coral nursery
Price range
$
Trip length
3–7 days
Diver level
Open water
Trip type
Day trip, Land based
Price is per person for a typical trip, excluding international flights ($ = under $2,000).
Among the cheapest diving in Asia. Two-tank day trips run roughly $55–70 on busy group boats (8–12 divers), $80–100 for smaller groups and better gear, and $125+ for private-boat or technical setups. A PADI Open Water course is commonly $330–450 all-in, which is why most people dive here at all. Nha Trang Bay entrance fees are trivial — VND 10,000 (about $0.40) per trip on the Hon Mun route, VND 40,000 (about $1.55) for a multi-island trip. A week here including accommodation sits comfortably under $2,000 per person excluding flights.
Best time to dive
- Current
- Mild
- Water temp
- 24–30°C (coldest Jan, warmest May)
- Visibility
- 5–15m — Typically 10–15m on a good day, and frequently less — 5–8m after rain or wind is ordinary. Operator claims of 20–30m are not representative of the sites most divers actually visit.
- Getting there
- Easy — Day trips from a coastal base, about 1h from the airport, then a short boat.
- Experience
- This is a beginner's region by design. Most sites sit between 5m and 18m with mild current, and Mama Hanh Beach and Moray Beach are used almost exclusively for Open Water training and try-dives. Only the deeper pinnacles — Light House and Electric Nose — need Advanced Open Water and reasonable buoyancy.
Nearest airports
- CXR — Cam Ranh International Airport (International airport with direct regional flights from Seoul, Kuala Lumpur, Singapore, Bangkok and elsewhere in Asia, plus frequent domestic links from Hanoi and Ho Chi Minh City; roughly 45 minutes by road to Nha Trang)
Marine life
Sightings are never guaranteed — the bars show typical likelihood by month.
| Month | Likelihood |
|---|---|
| January | rare |
| February | rare |
| March | rare |
| April | rare |
| May | rare |
| June | rare |
| July | rare |
| August | rare |
| September | rare |
| October | rare |
| November | rare |
| December | rare |
Reported from the rocky bottom and seagrass patches, but genuinely rare and not something to plan a dive around. Never handle one.
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Moray Beach takes its name from them and they are seen on most dives there, tucked into coral heads and rubble. Present year-round.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Singles and small groups hang off the outside of Madonna Rock and Small Wall. These are not the large schooling aggregations found elsewhere in the region.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Frogfish are found reliably on the sand and rubble slopes, particularly at Moray Beach and Fisherman Bay. Operator reports describe them loosely as black or camouflaged frogfish, so the hairy frogfish is one of several Antennarius species present rather than a confirmed sole identification.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Reported on the sandy slope at Moray Beach. Individual eels hold the same burrow for long periods, so sightings depend on whether the guide knows a current one.
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Anemones with resident clownfish are scattered across the shallow sites and are one of the few reliably photogenic subjects on a training dive.
| Month | Likelihood |
|---|---|
| January | rare |
| February | rare |
| March | rare |
| April | rare |
| May | rare |
| June | rare |
| July | rare |
| August | rare |
| September | rare |
| October | rare |
| November | rare |
| December | rare |
Effectively absent. Decades of fishing pressure inside Nha Trang Bay have left shark sightings very rare, and nobody should book this region expecting them.
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Present on essentially every site in the bay, from the 13m training slopes up to the pinnacles. No seasonality.
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
The most consistent thing in the water here. Guides routinely find a dozen or more species on a single dive at Moray Beach and Electric Nose. Present year-round with no meaningful seasonality reported.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Regularly reported at Madonna Rock and Moray Beach, usually paired in soft coral or crinoids. Finding one depends heavily on the guide rather than the month.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Seahorses are a standing feature of the shallow rubble and seagrass at Mama Hanh Beach and Moray Beach. Operator reports rarely specify the species, so treat the identification as probable rather than confirmed.
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Soft coral has held up better than the hard coral that collapsed at Hon Mun, and is densest on the offshore pinnacles at Electric Nose and Light House. Inshore sites are patchy — Nha Trang Bay hard coral cover fell to 11–33% by 2022 depending on the sector.
Dive sites
Worth knowing before you book
- Hon Mun's reef collapsed. Hard coral cover fell from 52–54% in 2015 to 11–33% by 2022 depending on the sector, with losses above 70% at many locations, and the strictly protected core has been closed to diving since June 2022. Recovery is real but slow — reef-building corals grow about 1cm a year.
- Reef quality at the open sites is modest and heavily worked. Expect broken and patchy hard coral, and sections that are visibly degraded rather than recovering.
- Visibility is typically 10–15m and often 5–8m. This is not a photography destination for wide-angle work.
- No reliable big animals. Sharks, rays and turtles are rare here after decades of fishing pressure — nobody should book Nha Trang expecting them.
- High diver volume on a small number of shallow training sites, and October to December is effectively a write-off: the late rainy season peaks in November (around 330mm) and boats routinely cancel.
Sources & last checked
Checked August 2026
This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.
- Dive tourism suspended in Nha Trang's Hon Mun from Monday to protect coral — Viet Nam News
- Reviving Hon Mun's coral reefs — Nhan Dan (Vietnam Communist Party newspaper)
- Measures needed to preserve Nha Trang Bay corals — Viet Nam News
- Nha Trang Bay introduces new entrance fees to fund marine conservation — Viet Nam News
- Warning of coral bleaching risk in Nha Trang Bay — Vietnam.vn
- Khanh Hoa issues master plan for Nha Trang Bay restoration — Vietnam News Agency (VietnamPlus)
- Nha Trang climate: weather by month, temperature, rainfall — Climates to Travel
- Nha Trang diving guide — Underwater Asia
- Dive Sites Nha Trang — Vietnam Diving and Training Center
- Diving in Nha Trang — PADI
Note on the data: Coral-cover figures and the 2022 diving suspension are well sourced to Vietnamese state media citing the Nha Trang Bay Management Board (Viet Nam News, Nhan Dan). The current 2026 status — strict-protection core still closed, diving continuing in designated zones under visitor caps — is corroborated across a July 2026 vietnam.vn report and 2026 tourism coverage, but no English-language provincial decision document was fetched directly, so the precise boundary of what is open is uncertain. One secondary source claims coral cover 'climbed back to 74.5%' after a one-year suspension; that figure could not be traced to the Management Board and is deliberately not used here. Entrance fees are primary-sourced to the 25 August 2025 regulation as reported by Viet Nam News. Site coordinates are approximate positions around Hon Mun island, not surveyed dive-site GPS. Site depths come from operator and dive-guide listings. operatingSeasonMonths includes January and September, when boats run but cancellations are more frequent; October is excluded as marginal and November–December as effectively closed. Species presence is drawn from operator site descriptions rather than survey data — reasonable for macro, weak for anything larger. Water temperature: Monthly surface averages run 25.5°C in January and February up to 29°C from May to September; the min/max values here are interpolated around those published averages to allow for depth and short-lived upwelling, not measured at depth. A 3mm suit is enough year-round. Access: About as easy as dive access gets in Southeast Asia: Cam Ranh International (CXR) takes direct regional flights and is roughly 45 minutes by road from Nha Trang, and dive boats reach the Hon Mun area in about 30–45 minutes from the Cau Da and Vinh Nguyen piers.