Koh Kradan and Four Islands

Koh Kradan is often described as the most beautiful of the small islands south of Ko Lanta, with a long arc of fine white sand, shallow turquoise water and a coral reef that begins just off the beach. This full-day tour by longtail boat adds Kradan to the classic four islands route, so you get a swim at the beach, snorkeling stops around the nearby islets and the chance to see Emerald Cave on Koh Mook. It is a good choice for travelers who want a day with a bit more time on sand than the standard tour, and for those who prefer the slower pace of a traditional boat. The trip is run by a local operator and can be booked as a small shared group.

The day follows a loose rhythm. After a morning hotel pickup and a short drive to the pier, you board the longtail boat and cross the channel to the islands. The first stops are usually snorkeling spots near Koh Ngai or Koh Chuek, where there is shallow coral and plenty of small fish. After that, the boat continues to Koh Kradan, where you have time to swim, walk the beach and have lunch.

The island has a few small restaurants and bungalows on its shore, and the sand is the kind that squeaks underfoot. Visitors who like quiet will be glad to know that Kradan is much calmer than the beaches of Phuket or Phi Phi.

The reef at Kradan is one of its attractions. In the shallows you can see branching coral, sea fans, clownfish in anemones and schools of colorful reef fish. The water is clear in the dry season and quite calm, which makes it easy for beginners and children. Remember that coral is fragile: do not stand on it, and use reef-safe sunscreen. If you are comfortable in the water, ask the guide for the best spots, and consider wearing a rash vest, which protects your shoulders from the sun and the cold from the water.

The tour usually includes a swim through Emerald Cave on Koh Mook, as in the standard four islands trip, although the order can vary with the tide. Check the itinerary when you book to see which stops are included, because some operators swap the cave for Koh Ngai if the water is high. Lunch is typically served on the beach at Kradan or aboard the boat, and drinking water and fruit are provided. Bring cash for extra drinks or a coffee on the island.

Longtail boats move slowly, so the day is long, often eight hours or more. Come with a hat, sunscreen, a towel and a dry bag, and bring a light layer for the return trip, since the breeze over open water can feel cool at the end of the day. The tour suits couples, families with children aged six and up and anyone who wants relaxed island time.

It is best between December and March, when seas are calm and the water is clear. If you are choosing between this and the standard four islands trip, pick this one for more beach time and the standard one for a faster, more compact day.