Bida Nai
Bida Nai is one of the best dive sites in the Phi Phi Islands and a favorite among experienced divers and snorkeling enthusiasts visiting Phuket or Ko Phi Phi. Located just south of Ko Phi Phi Leh, this small limestone islet is surrounded by crystal-clear water, dramatic underwater cliffs, healthy coral reefs, and an impressive variety of tropical marine life. Although the island itself cannot be explored on foot, the underwater world is what makes Bida Nai one of the highlights of any Phi Phi boat tour.
Whether you’re joining a diving excursion from Phuket or spending a few days on Ko Phi Phi Don, Bida Nai is well worth including in your itinerary if you want to experience some of Thailand’s most beautiful underwater scenery.
How to Get to Bida Nai
Bida Nai can only be reached by boat. There are no ferries or public transportation that stop here, so visitors typically arrive as part of an organized diving or snorkeling trip.
- From Phuket: Full-day speedboat diving and snorkeling tours regularly visit Bida Nai during favorable sea conditions.
- From Ko Phi Phi Don: Local dive centers operate daily trips to Bida Nai, often visiting multiple dive sites around the islands.
- Private Longtail Boat: Private boats can sometimes stop near the island for snorkeling, depending on weather and sea conditions.
The journey from Ko Phi Phi Don usually takes around 20 minutes, while trips from Phuket typically take between 1.5 and 2 hours by speedboat.
Snorkeling at Bida Nai
Bida Nai offers excellent snorkeling when the sea is calm. The shallow reef areas are home to colorful coral formations, schools of reef fish, sea anemones, giant clams, and many other marine species. Water visibility often ranges between 15 and 30 meters during the high season, making it easy to spot marine life even from the surface.
Since there are no beaches or facilities, snorkeling is always done directly from a boat. Conditions can vary depending on currents, so it’s important to follow your guide’s instructions and wear a life jacket if recommended.
Diving at Bida Nai
Bida Nai is widely regarded as one of the top dive sites in southern Thailand. The underwater landscape features steep limestone walls covered with soft corals, hard corals, sea fans, overhangs, and small caves that create a spectacular environment for divers.
Certified divers can explore depths ranging from approximately 5 to 30 meters, making the site suitable for both intermediate and advanced divers depending on conditions. Currents can occasionally be strong, adding excitement for experienced divers while still offering calmer sections for less experienced participants.
The site is also popular for underwater photography thanks to its colorful reef life and excellent visibility.
Marine Life You Can See
Bida Nai is famous for its biodiversity. Every dive offers something different, and lucky visitors may encounter larger pelagic species alongside smaller reef inhabitants.
- Blacktip reef sharks
- Leopard sharks resting on sandy bottoms
- Sea turtles
- Moray eels
- Barracudas
- Trevallies
- Lionfish
- Scorpionfish
- Octopus
- Cuttlefish
- Colorful nudibranchs
- Large schools of snapper and fusiliers
- Clownfish living among sea anemones
Sightings vary throughout the year, but marine life is abundant in every season.
Best Time to Visit
The best time to visit Bida Nai is during Phuket’s dry season from November to April. During these months, the Andaman Sea is generally calmer, visibility is excellent, and boat tours operate more consistently.
The rainy season from May to October can still offer enjoyable diving, although stronger winds, larger waves, and reduced visibility are more common. Some tours may change their itinerary depending on weather conditions.
Tour Prices
Prices depend on where you depart and whether you’re joining a snorkeling or diving excursion.
- Snorkeling tours from Phuket: approximately 2,500–4,500 THB per person.
- Certified diving trips: approximately 3,500–6,500 THB including equipment.
- Private speedboat charters: prices vary depending on group size and itinerary.
Many full-day tours combine Bida Nai with Maya Bay, Pileh Lagoon, Viking Cave, Monkey Beach, and other famous Phi Phi attractions.
Things to Know Before You Visit
- There are no beaches, restaurants, shops, or toilets on Bida Nai.
- Bring reef-safe sunscreen to help protect marine ecosystems.
- Never touch coral or marine animals while snorkeling or diving.
- Sea conditions can change quickly, especially during the monsoon season.
- Always follow your dive instructor or snorkeling guide.
- Bring a waterproof camera if you want underwater photos.
Nearby Attractions
Most tours visiting Bida Nai also stop at several iconic destinations around the Phi Phi Islands, making it easy to experience multiple highlights in one day.
- Maya Bay
- Pileh Lagoon
- Bida Nok
- Viking Cave
- Loh Samah Bay
- Monkey Beach
- Ko Phi Phi Don
Is Bida Nai Worth Visiting?
If you’re interested in snorkeling or diving, Bida Nai is absolutely worth visiting. Its dramatic underwater cliffs, healthy coral reefs, and abundant marine life make it one of the premier dive sites in the Phi Phi Islands. Even if you’re not a certified diver, snorkeling around the island offers an unforgettable opportunity to experience the vibrant underwater world of the Andaman Sea.
Combined with nearby attractions such as Maya Bay and Pileh Lagoon, Bida Nai is an excellent addition to any Phi Phi Islands day trip and remains one of the best places in Thailand to explore beneath the surface.
Bida Nai Location & Map
Bida Nai is the southernmost of the two Bida Islands, located just off the southern tip of Ko Phi Phi Leh in Krabi Province. It sits only a few hundred meters from its neighboring island, Bida Nok, and is commonly visited together with Maya Bay, Pileh Lagoon, Loh Samah Bay, and other famous attractions around the Phi Phi Islands.
Its isolated location and limestone cliffs create excellent underwater conditions, with walls, caverns, coral gardens, and swim-throughs that attract divers from around the world.
FAQ about Bida Nai
What is Bida Nai?
Bida Nai is a small limestone islet located just south of Ko Phi Phi Leh in Thailand’s Phi Phi Islands. It is famous for its world-class diving, excellent snorkeling, and diverse marine life.
Can you visit Bida Nai without diving?
Yes. Many boat tours stop at Bida Nai for snorkeling, allowing visitors to enjoy the colorful coral reefs and tropical fish without scuba diving.
How do I get to Bida Nai?
Bida Nai can only be reached by boat. Most visitors join a snorkeling or diving tour from Phuket or Ko Phi Phi Don, while private speedboat and longtail boat charters are also available.
Is Bida Nai suitable for beginner divers?
Yes. Depending on sea conditions, Bida Nai offers dive sites suitable for beginners as well as more challenging areas for experienced divers. Certified instructors will choose appropriate dive locations based on skill level.
What marine life can you see at Bida Nai?
Visitors commonly spot blacktip reef sharks, leopard sharks, sea turtles, moray eels, barracudas, clownfish, lionfish, octopus, cuttlefish, nudibranchs, and large schools of tropical reef fish.
When is the best time to visit Bida Nai?
The best time to visit is between November and April when the Andaman Sea is generally calm, visibility is excellent, and boat tours operate under the most favorable conditions.
Are there facilities on Bida Nai?
No. Bida Nai is an uninhabited rocky island with no beaches, restaurants, toilets, or shops. Visitors remain on their tour boat when not in the water.
How much does a tour to Bida Nai cost?
Snorkeling tours from Phuket generally cost between 2,500 and 4,500 THB per person, while scuba diving trips typically range from 3,500 to 6,500 THB depending on the operator and inclusions.
Can you see sharks at Bida Nai?
Yes. Bida Nai is one of the best places in the Phi Phi Islands to see blacktip reef sharks, and lucky divers may also encounter leopard sharks resting on the sandy seabed.
Is Bida Nai included in Phi Phi Islands tours?
Many full-day snorkeling and diving tours include Bida Nai alongside popular attractions such as Maya Bay, Pileh Lagoon, Viking Cave, Loh Samah Bay, and Bida Nok.
