Hong Island Krabi: Complete Guide to the Lagoon & 360° Viewpoint

Ask any boat captain in Krabi to name the one island that never disappoints, and you will hear the same answer: Hong Island. Tucked inside Than Bok Khorani National Park, Koh Hong combines a powder-white beach, an emerald lagoon hidden inside the rock, and a hilltop viewpoint with a full 360° panorama of the Andaman Sea. Here is everything you need to know before you go.

Why Hong Island Is Worth the Trip

"Hong" means "room" in Thai, and the name refers to the island's famous lagoon — a natural room of limestone with a narrow entrance just wide enough for a longtail boat. Outside the lagoon, the main beach (Pelay Beach) offers calm, shallow, glass-clear water that is perfect for swimming and snorkeling, with far fewer boats than the 4 Islands route on a typical day.

The Hong Lagoon

The lagoon is best visited at mid-to-high tide, when boats can glide through the entrance and the water inside turns a surreal shade of jade green. At low tide the lagoon becomes too shallow to enter, so timing matters — one of the biggest advantages of a private boat is that your captain can plan the day around the tide table rather than a fixed group schedule.

The 360° Viewpoint

Opened in 2019, the Hong Island viewpoint sits at the top of a staircase of roughly 400 steps. The climb takes 20–30 minutes at an easy pace, and the reward is one of the best views in Krabi: the entire Koh Hong archipelago, turquoise shallows and limestone karsts stretching to the horizon. Bring water, wear proper footwear, and go early in the day before the heat builds.

Park Fees & Opening Hours

Hong Island is part of Than Bok Khorani National Park. The entrance fee is 300 THB per adult (reduced fee for children), paid in cash on arrival, and it is usually not included in tour prices. The island is open for day visits only — there is no accommodation on Koh Hong — and rangers generally admit visitors from the morning until late afternoon. Fees and rules can change, so check current rates before you travel.

How to Get There from Ao Nang

Hong Island lies northwest of Ao Nang, about 45 minutes by longtail boat or 20–25 minutes by speedboat. A private longtail is the classic way to arrive: you travel at your own pace, stop at neighboring gems like Koh Lao Lading ("Paradise Island") and Koh Phak Bia, and stay on the beach after the group tours leave.

Best Time to Visit Hong Island

November to April brings the calmest seas and clearest water. Arrive before 10 am or after 2 pm to enjoy the beach at its quietest — the middle of the day is when most speedboat groups arrive. In green season (May to October) the island is beautifully quiet, though sea conditions vary day to day.

Quick Tips

• Bring 300 THB per person in cash for the national park fee.

• Use reef-safe sunscreen — the snorkeling here is some of Krabi's best.

• Ask your captain to time the lagoon for mid-to-high tide.

• Pack water and shoes for the 400-step viewpoint climb.

Visit Hong Island with Krabi Voyager

Krabi Voyager runs private luxury longtail boat tours to Hong Island, Koh Lao Lading and Koh Phak Bia — your own boat, your own schedule, and a captain who knows exactly when the lagoon is at its best. Book your private Hong Island tour here.