Diving Nha Trang: My Best Dive Sites & Tips

I dove Nha Trang in August 2026, two dives in a day with Nha Trang Diving Club, out to Dam Bay and Madonna Rock on Hon Tre.

Nha Trang built its diving reputation on Hon Mun, and Hon Mun has been closed since 2022.

That is the single most important thing to know before you book here, and almost nothing written about diving in Nha Trang online mentions it.

What is left is rock diving. Boulders, walls and swim-throughs on the outskirts of the protected area, with coral growing on the structure rather than building it.

Why You Cannot Dive Hon Mun

Hon Mun is Vietnam's first marine protected area, and it is the reason Nha Trang has a diving reputation at all.

Typhoon Damrey came through in November 2017 and destroyed an estimated 70 to 80 percent of the coral across Nha Trang Bay. More storms at the end of 2021 tore up another stretch, with up to 70 percent of the reef on Hon Mun's southwest side reported washed ashore.

In late June 2022 the city shut Hon Mun to diving, swimming and boat tours so it could recover. Coral cover across the bay had fallen from around 60 percent in 2020 to roughly 50 percent.

It was still closed when I dove here in August 2026. Every shop in town now runs sites on the outskirts of the protected area instead, which is how you end up at Madonna Rock.

The Best Dive Sites in Nha Trang

I dove two sites in a day, and they are not close in quality.

Best Dive in Nha Trang: Madonna Rock

Madonna Rock sits on the outskirts of Hon Mun, and with the marine park closed it is the best dive available out of Nha Trang.

This is the site that shows you what Vietnamese diving actually is. Boulders, walls and narrow passages, with several caves you can swim straight through.

Barracuda schooled in the blue off the slope, twice, and the macro here was the best of my whole Vietnam trip.

Nudibranchs everywhere, a yellow boxfish wedged into a crevice, hawkfish sitting up on the coral heads, a pair of lizardfish on the rock and pink skunk clownfish in the anemones.

The urchin density is the thing nobody warns you about. Long spined urchins are wedged into every gap in the rock across both Nha Trang sites, and they are worth watching on a dive this shallow with a swell running.

Visibility was 20 ft (6 m), better than Dam Bay the same day and still well short of what this site can do.

Best Beginner Dive: Dam Bay

Dam Bay sits on Hon Tre, the big island off the Nha Trang coast, and it was the first dive of the day.

It is shallow the whole way through at 23 ft (7 m) max and 12 ft (3.7 m) average, on a rocky bottom running out into sand with coral scattered across it.

This is a training site, and it is busy. Snorkel boats and day trippers were in the water with us for most of the dive.

There is a rusted bicycle sitting upright on the sand, which is the thing everyone photographs here.

Marine life held up better than the 16 ft (5 m) of visibility deserved. A lionfish against the rock, a maroon clownfish pair in an anemone, a line of juvenile trumpetfish hanging nose down over the sand, and boulder and branching coral across the top of the reef.

If you are certified and you get a choice, ask for Madonna Rock. Dam Bay is where the discover scuba and open water students go.

Sites I Didn't Dive

Two dives in one day does not cover a bay this size. These are the Nha Trang sites that come up repeatedly in operator listings and that I did not get to, so I cannot rank them or tell you what they are like right now.

Bear in mind that every one of them sits in the same storm damaged bay, so the coral reports attached to them predate 2017 in a lot of cases.

Closed Indefinitely: Hon Mun

Covered above. Closed to diving, swimming and boat tours since late June 2022, and still closed in August 2026. Assume it is unavailable and treat any reopening as a bonus.

Deepest Option: Electric Nose

Listed as a wall dive running to around 148 ft (45 m) with current, and flagged as advanced only. It is the one site in the bay that is genuinely deep.

Macro Option: Moray Beach

Listed at around 66 ft (20 m) with hard and soft coral and giant morays. It also shows up on the seasonality guides as a March to October site, same as the rest of the bay.

The Other Names: Rainbow Reef and Whale Island

Rainbow Reef appears on most Nha Trang site lists. Whale Island sits well north of the city and is really its own destination with its own boat logistics rather than a Nha Trang day trip.

Best Time to Dive Nha Trang

Nha Trang Diving Club put the season at April to October, and other operators stretch the front end back to March. The northeast monsoon closes it down from roughly November to January.

That is the opposite of Phu Quoc on the other side of the country, which runs November to May. If you are picking a month rather than a place, March and April work almost everywhere in Vietnam.

I went in August, which is inside the window.

Being in season did not help me. Storms came through in the days before the dive and the water had not settled back down, so I had 16 to 20 ft (5 to 6 m) of visibility.

Nha Trang Diving Club told me the bay goes up to 49 to 66 ft (15 to 20 m) when it is settled, and they told me that before I booked rather than after. What I got was not a normal August.

Dive Operators in Nha Trang

I dove with Nha Trang Diving Club, an SSI center in town.

They told me the visibility was blown out before I booked, not after. Storms had come through in the weeks prior and they said so plainly. I went anyway because I was not willing to wait it out any longer, and that was my call rather than a surprise.

They picked me up at my hotel, drove me to the marina, and ran the day with lunch and gear included.

What Diving Nha Trang Costs

This is what I actually paid in August 2026.

• Two dive day with Nha Trang Diving Club: $75, including gear, guide, lunch and hotel pickup

Budget a full day for it either way. It is a 1 to 1.5 hour boat ride each way from the marina out to the sites, so there is no such thing as a quick morning trip here.

Water Conditions and What to Wear

Water temperature was 78.8°F (26°C) on both dives. A 3mm full suit is the right call, and it is noticeably cooler than the Cham Islands further north, which sat at 86°F (30°C) in the same month.

Visibility was 16 ft (5 m) at Dam Bay and 20 ft (6 m) at Madonna Rock, both knocked down by recent storms. The operator's own figure for a settled bay is 49 to 66 ft (15 to 20 m).

These are shallow dives. My deepest point across both was 39 ft (11.9 m), so air consumption and no-decompression limits are not the constraint here. Surface conditions are.

Where to Stay in Nha Trang

Stay in Nha Trang city. The dive shops run hotel pickup, so anywhere central gets collected without a surcharge and you are not gaining anything by staying closer to the marina.

Nha Trang is a full beach resort city rather than a dive town, which is a real difference from somewhere like Koh Tao. The diving is a day trip you bolt onto a city stay, not the reason the town exists.

Getting to Nha Trang

Cam Ranh International (CXR) is the airport, about 40 minutes south of the city. Domestic flights from Hanoi, Da Nang and Ho Chi Minh City are cheap and frequent.

Vietnam's north to south rail line also runs through Nha Trang, which makes it easy to chain onto a coastal trip rather than flying in and out.

The questions I get asked most about diving here.