Koh Mat Sum.

Koh Mat Sum sits thirty minutes from Bophut — the closest island to Samui, small enough to walk across in twenty minutes. The beach is wide and white, the water shallow and warm, and the small resident pigs are more or less tame. The reefs around the neighbouring Koh Tan are shallow and full of colour, and the channel between the two islands is usually calm. This is a half-day for guests travelling with children, or for a second day on the water when the first has been long, or for groups whose Samui holiday does not allow for a full crossing.