Emerald lagoon of Hong Island near Krabi, surrounded by steep limestone walls
Island guide

Hong Island Krabi – the hidden lagoon and its secrets

4 分で読めますUpdated:

Hong Island Krabi, Koh Hong in Thai, is for many visitors the most beautiful destination off Ao Nang. The name roughly means island of rooms or chambers – and that is its secret: inside the limestone island lies a lagoon, enclosed by sheer cliffs and connected to the sea only by a narrow channel. Note: there is also a Koh Hong in Phang Nga Bay. This guide is about the Krabi island in Than Bok Khorani National Park.

Contents

Location and getting to Hong Island

Koh Hong lies northwest of Ao Nang and is part of Than Bok Khorani National Park. By speedboat it takes around 30 to 45 minutes depending on the sea. There is a national park checkpoint on the island’s beach, where an entrance fee is usually charged.

The Hong group includes several islands, among them Koh Lao Lading and Koh Pakbia, which combine perfectly into a day trip.

The Hong lagoon: best at high tide

The lagoon is the heart of the island. Boats glide through a narrow entrance, and suddenly you are surrounded by near-vertical, overgrown cliffs, the water emerald green and mirror-smooth. It is a magical place, especially when only a few boats are inside.

Access depends heavily on the tides. At high tide the lagoon is easily navigable and feels like a still lake. At low water it becomes shallow, parts dry out and larger boats cannot get in. The right timing is therefore crucial to the experience.

Beach, viewpoint and snorkelling

The main beach on Koh Hong has fine sand and is framed by rocks. You can snorkel off the beach and along the rocks, often with plenty of fish. From the beach a path with steps leads to a viewpoint with a wonderful view over the bay and surrounding islands. The climb is sweaty but short.

  • Lagoon: in by boat, best at high tide
  • Beach: swimming, shade, national park station
  • Viewpoint: short, steep stair climb
  • Snorkelling: along the rocks either side of the beach

Hong Island without the crowds

The Hong trip is one of the most popular group tours from Ao Nang. Most boats arrive in the late morning, and many move on after lunch. Start early and you often have the lagoon almost to yourself. The alternative is a late visit, when the groups are already heading home.

Hong Island is also a popular base for evening outings to watch the sunset and bioluminescent plankton, as the waters around the islands are dark and calm at night.

Snorkel spots & relaxing on Koh Hong

The best snorkel spots on Koh Hong are along the rocks to the left and right of the main beach. The water here is often clearer than in the lagoon, with reef fish right above the rocky bottom. It is clearest in the morning in the dry season, before many boats land and stir up the water.

For relaxing, the beach has shade under trees and along the rocks. If you want quiet, head to the far end of the beach, away from the national park checkpoint. Only swim in the swimming areas – boats come and go in front of the beach regularly.

What to bring for Koh Hong

Besides the classics like sunscreen and water, snorkel gear, water shoes for rocky entries and decent shoes for the viewpoint are useful on Hong Island. Bring cash for the national park fee in case it is not included in the tour price.

よくあるご質問

How far is Hong Island from Ao Nang?

About 30 to 45 minutes by speedboat, depending on the sea. By longtail the ride takes considerably longer.

Can you swim in the Hong lagoon?

The lagoon is mainly explored by boat. Whether and where swimming is allowed may depend on national park rules – the beach and snorkel spots are better for swimming.

Is Hong Island Krabi the same as Hong Island Phang Nga?

No. There are two islands called Koh Hong. This guide covers the island in Than Bok Khorani National Park off Krabi. The other one is in Phang Nga Bay.

When is the best time for Hong Island?

Early in the day and at a higher water level for the lagoon. The dry season from roughly November to April offers the calmest seas.

Experience this place privately

Private speedboat from Ao Nang for a maximum of 5 guests – route and timing planned around the tides and your wishes.

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Matching tours

These private tours visit the places in this article.

切り立った石灰岩の壁に囲まれた Krabi(クラビ)近くの Hong Island のエメラルドグリーンのラグーン
7時間 · 08:00 出発

Hong Island Secret Lagoons & Hidden Bays

乗合ボートが訪れない、エメラルドのラグーンと入り江へ。

料金 ฿21,500 per boat · max. 5 guests

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夜に光るプランクトン:Krabi(クラビ)のプライベートスピードボート横の海に広がる青い生物発光
4時間 · 18:00 出発

Night Glow – スピードボートで夜光プランクトンへ

夜の光る海で泳ぐ――動くたびに青くきらめきます。

料金 ฿14,500 per boat · max. 5 guests

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