Koh Samui is amid in the Gulf of Thailand, about 35 km northeast of Surat Thani Town (9°N, 100°E). The island measures some 21 kilometres at its widest point, and 25 km at its longest. It is amidst by about sixty added islands, which compose the Ang Thong Marine National Park (Mu Ko Ang Thong National Park) and accommodate added day-tripper destinations (Koh Pha Ngan, Koh Tao and Koh Nang Yuan).
The island is about annular in shape, and is about 15 km across. The axial allotment of the island is an about uninhabitable abundance jungle, Khao Pom, peaking at 635 m. The assorted lowland areas are affiliated calm by a distinct 51 km road, active mostly forth the bank to band the aggregate of the island.
The old basic is Nathon, on the southwest bank of the island. It charcoal the above anchorage for fishing and inter-island transportation. Nathon is the bench of the bounded government, and the accurate bartering hub of the Samui locals. It has a absorbing pace, and is about baby abundant to airing everywhere. The old Chinese boutique houses forth the average artery buzz of an alien history.
Each of Samui's primary beaches is now additionally nominally advised as a baby town, due to the cardinal of hotels, restaurants and nightlife that accept sprung up in contempo years.