Cu Lao Mai Nha: A Traveler's Guide to Phu Yen's Wild Island

What it is

Cu Lao Mai Nha is a small, rocky island roughly 20 km off the coast of Song Cau town in Phu Yen province. It sits alone in the open sea — no pier, no guesthouse, no restaurant. The island is essentially a granite slab covered in scrubby forest, ringed by coral reefs and tide pools. Local fishermen have used it as a temporary shelter for generations (the name translates loosely to "Rooftop Island," after the way its flat rock formations resemble a house roof), but nobody lives there permanently.

For years it was just a dot on nautical charts. Then backpackers and Vietnamese camping groups discovered its reefs and solitude around 2018-2019, and it became one of those semi-secret spots people share in Facebook groups with the caveat "go before it changes."

Why travelers go

Three reasons, basically:

1. Snorkeling and freediving — The coral around the island's south side is in good shape. Visibility runs 8-15 meters depending on season. You'll see clownfish, parrotfish, sea urchins, and soft coral without needing a boat ride to a designated "snorkeling point."

2. Camping on rock — There's something specific about pitching a tent on a flat granite shelf with nothing between you and the horizon. No light pollution. No phone signal (or barely one bar of 4G if you're lucky).

3. The crossing itself — The 90-minute boat ride from Song Cau passes fishing villages, lobster farms, and open water. It's not a luxury cruise; it's a wooden fishing boat with a tarp for shade.

Best time to visit

March through August. The sea is calmest from April to July — this is when boat operators will actually agree to take you. From September onward, swells pick up and the crossing gets rough or impossible. December to February is monsoon season; don't even ask.

Peak months (June-July) coincide with Vietnamese domestic travel season, so you might share the island with a few other camping groups. "Crowded" here means 20 people total.

How to get there

Getting to Song Cau: From Da Nang, it's about 5-6 hours by bus or private car south along the coast, passing through Hoi An and Quy Nhon. From Saigon, fly to Tuy Hoa (Dong Tac Airport, ~75 minutes), then drive 50 km north to Song Cau town. A taxi from Tuy Hoa airport costs around 400,000-500,000 VND.

The boat: There's no public ferry. You arrange a fishing boat through local contacts or a tour operator in Song Cau. Expect to pay 2,500,000-4,000,000 VND for a round-trip charter (the boat fits 8-12 people, so splitting costs helps). The captain will drop you off, leave, and return on your agreed pickup day. Yes, you're actually stranded on purpose.

Some Quy Nhon and Tuy Hoa-based tour groups run organized camping trips (search "Cu Lao Mai Nha tour" on Facebook) for 1,200,000-1,800,000 VND per person including boat, food, tent, and guide. This is the easier option if you don't speak Vietnamese.

Photo by Trung Nguyen on Pexels

What to do

Snorkel the south reef

Bring your own mask and snorkel — nobody rents gear on a deserted island. The reef starts close to shore on the southern side, where the rocks slope into the water gradually. Morning light is best for visibility.

Walk the island perimeter

It takes about 2 hours to scramble around the coastline at low tide. The rock formations on the eastern face are layered and geometric, almost like stacked tiles. Wear shoes with grip; the rocks are sharp and slippery with algae.

Fish with handlines

If your boat captain left you some handlines and bait, the water off the north side produces small reef fish. Grill them over driftwood. This is dinner.

Do nothing

Honestly, the island rewards sitting still. Watch the light change on the water. Read a book. Sleep at 8 PM because there's nothing else to do after dark.

Where to eat

You don't. There's no food on the island. Bring everything:

• Rice, instant noodles, canned fish
• Fresh seafood bought in Song Cau market before departure (keep it in a cooler)
• Drinking water — at least 3 liters per person per day
• A portable gas stove or charcoal for grilling
• Vietnamese coffee and a phin filter, because mornings on a rock slab deserve that much

If you join an organized tour, food is handled for you — usually grilled squid, seafood hotpot, and rice cooked on portable burners.

Where to stay

Your tent. On rock. Bring a thick sleeping pad; granite is unforgiving. Some groups bring hammocks and string them between the few trees near the island's center, but tree coverage is sparse.

There's a semi-sheltered flat area on the western side that most campers use. It's out of the wind and close enough to the waterline to hear waves without getting splashed at high tide.

Back in Song Cau, budget guesthouses run 200,000-350,000 VND/night if you need a bed before or after the crossing.

Photo by Quang Vuong on Pexels

Practical tips

• Pack out your trash. This island has zero waste management. Bring garbage bags and take everything home.
• Sunscreen is non-negotiable. There's almost no shade. The rock reflects heat. You will burn.
• Bring a headlamp and backup batteries. Nights are pitch black.
• Tell someone your plan. You'll have minimal phone signal. Leave your itinerary with your guesthouse in Song Cau.
• Reef shoes or sport sandals for water entry — coral cuts get infected fast in tropical humidity.

Common mistakes

Underestimating water needs. Three liters per day is a minimum. If you're active and it's hot (it's always hot), bring more.

Arriving in Song Cau without a boat arranged. Don't assume you'll find a captain on the spot. Contact one at least 2-3 days ahead, especially on weekdays when fewer boats are available.

Going in shoulder season without checking conditions. September can look calm from shore but have 2-meter swells offshore. Trust the captain's judgment — if they say no, it's no.

Expecting Cu Lao Cham-level infrastructure. Cu Lao Cham near Hoi An (호이안 / 会安 / ホイアン) has homestays, restaurants, and marked trails. Cu Lao Mai Nha has rocks and silence. That's the point, but be prepared for it.

Final note

Cu Lao Mai Nha isn't a destination for everyone. It requires planning, self-sufficiency, and comfort with genuine isolation. But if you've done the beach-town circuit — Phu Quoc, Mui Ne, Da Nang (다낭 / 岘港 / ダナン) — and want something that feels unmediated, this is one of the few places left on Vietnam's coast where you can have that.