Rating: 3.8/5 (5 votes)

Open Days: Daily (check the latest park notices before your trip)

Opening Hours: 08:00–18:00 (may vary with weather and park announcements)

 

Koh Kudi (Koh Kut) in Rayong is a calm, crystal-clear island east of Koh Samet, protected under Khao Laem Ya–Mu Ko Samet National Park. Fine white sand, turquoise water, and shallow coral gardens make it a favorite for low-key beach time and snorkeling without the crowds. The island sits roughly 6–7 km off the coast around Ban Phe / Suan Son Beach, reachable by private boat in about 15–20 minutes.

 

Beyond its pristine sea, the island carries a literary flavor. The Samet archipelago echoes motifs from Sunthorn Phu’s Thai epic Phra Aphai Mani. You’ll hear place-names like “Sinsamut” and “Nilmangkorn” around Koh Kudi (e.g., Sinsamut Beach and Pha Nil Mangkorn Viewpoint), which add a storybook layer to a very real seascape.

 

The interior is mostly forest and rocky shore. A nature trail of about 1.1 km lets you explore local flora and climb to views; the highlight is Pha Nil Mangkorn, a lookout where blue water meets sculpted rock and nearby islets. The main swimming spot is Sinsamut Beach, a compact arc of powdery sand with clear, swimmable water.

 

Top things to do include relaxed swimming, snorkeling over shallow coral (always wear a life jacket and avoid stepping on corals), short nature walks, and stargazing at night. For overnight stays, choose the park’s simple bungalows or the designated camping area. Facilities are basic—toilets and limited power from a generator in the early evening—so bring your own drinking water and supplies as there is no full-service shop on the island.

 

Getting There Most visitors depart by private longtail or speedboat from Ban Phe Pier or Suan Son Beach. Travel time is roughly 15–20 minutes. Confirm the price, pick-up/return times, boarding point, and safety gear in advance. In monsoon periods, check weather and any temporary closures. Day trips are easy; for overnight, reserve park lodging or camping space first.

 

 

A: Generally late November to April, when seas are calmer. Always check weather and park notices close to your travel date.

 

A: Park entry fees (per current notice), a private boat charter round trip (varies by boat type, group size, and time), plus your own food and water. Koh Kudi typically requires chartered boats rather than scheduled ferries.

 

A: No full-service shop; bring supplies. The park provides limited generator power in the early evening. A headlamp and power bank are useful.

 

A: Yes, book park bungalows or request camping space in advance, especially for weekends or holidays.

 

A: The main cove at Sinsamut Beach and shallow coral patches around the island as advised by park staff. Wear a life jacket and avoid stepping on coral.

 

A: The Samet archipelago features in the cultural memory of the epic; names like Sinsamut and Nil Mangkorn around Koh Kudi reflect this literary connection.