The boat slows about fifty metres out and the first thing you notice is not the pigs. It is the sand, which is paler than the beaches on Samui, and the water over it, which is the colour that gets this island called the Bahamas of Thailand on half the videos about it. Then somebody at the front says "there" and you see them: a handful of dark shapes walking down from the trees toward the waterline, because a boat has arrived and a boat means fruit.
There is no pier on Koh Madsum. The boat anchors off the beach and you wade the last few metres, knee deep for an adult. This is the moment the flip-flops get lost and the phone in the shorts pocket gets wet, so hold both above the water and wear sandals with a strap. Our packing page is short and this is most of it.
You do not have to go looking. The pigs live on this beach, sleep in the shade behind it, and have learned exactly what the sound of an engine means. Some walk along the sand to meet the boat. On a cool morning at high tide a few will wade into the shallows, and that is the picture everyone came for. It is not guaranteed; on hot days they stay in the shade and the morning boats get the better luck, which is one reason we point first-timers at the earliest departure.
The guide brings watermelon and the beach bar sells its own pig feed. The rule changes with the day: sometimes the staff are happy with fruit from the boat, sometimes they ask that only their feed is used, and whatever they say that morning is the rule. Hold fruit on a flat hand or drop it in front of the animal. A closed fist or a piece held high makes a pig jump for it, and that is where nearly every reported nip comes from. Do not put anything edible in a pocket. A pig will find it, and will not be polite about it.
Pigs on a beach are one of the easiest things on Samui to do with kids, and the animals are used to small people. Keep an adult beside toddlers on the sand and out of the water when the biggest pigs are wading. Let the staff handle the herd. The with-kids comparison picks the boats that make the rest of the day easy too.
Arriving without cash: the landing fee is THB 50 per adult, collected on the island, on every tour. Chasing a pig into the shade for a photo: a pig that has left the water wants to be left alone. Ordinary sunscreen before the Koh Tan reef: it harms the coral and the reef is shallow enough to notice. And forgetting to look up from the pigs at all, because the beach itself, empty at ten in the morning with a longtail swinging on its anchor, is the other half of why people come.
After an hour or so the guide calls the boat and you wade back out, sandier and happier than you arrived. Koh Tan and the snorkelling come next, then lunch at the pier. The shared morning speedboat is the tour most first-timers take; the comparison page shows the rest.