Ai Khiao waterfall, Nakhon Si Thammarat

Deep within Nakhon Si Thammarat’s lush forests, Ai Khiao waterfall offers one of southern Thailand’s most rewarding jungle adventures. This multi-tiered cascade tumbles down granite cliffs through dense tropical vegetation, creating a series of natural pools perfect for cooling off after the trek in. Unlike many tourist-heavy waterfalls, Ai Khiao maintains its wild character, with crystal-clear water flowing year-round and pristine surroundings that feel authentically untouched.

The waterfall consists of several distinct levels, each offering different experiences for visitors. The main cascade drops approximately 20 meters into a deep emerald pool ideal for swimming, while smaller tiers above create shallow bathing spots surrounded by smooth boulders. The sound of rushing water echoes through the forest canopy as butterflies dance around flowering vines and the air carries the earthy scent of decomposing leaves mixed with fresh mountain water. Adventurous visitors can explore the upper levels by scrambling over rocks, discovering hidden alcoves and smaller pools along the way. The surrounding jungle teems with bird calls and the occasional rustle of wildlife moving through the undergrowth.

Tranquility defines the Ai Khiao experience, broken only by the therapeutic sound of cascading water and forest life. The remote location means you’ll often have the waterfall largely to yourself, creating an intimate connection with nature that’s increasingly rare in Thailand. Swimming in the cool mountain water while surrounded by towering trees and tropical plants feels like discovering your own private sanctuary, far removed from the bustling tourist trails of southern Thailand’s coastal areas.

Visit during or just after the rainy season (June through December) when water flow reaches its peak and the surrounding vegetation is at its most vibrant. The hike from the road takes about 30 minutes through jungle terrain, so wear sturdy shoes with good grip and bring plenty of water. A basic level of fitness is required as the trail includes some steep sections and stream crossings. Pack swimming gear, insect repellent, and waterproof bags for electronics – this natural gem rewards those willing to work for it.