For calm waters and access to more snorkelling sites, plan your excursions and stay at a nearby Khao Lak beach resort during the dry season, which stretches from November to April. During this period, minimal rainfall ensures clearer waters and optimal visibility, allowing visitors to explore abundant coral habitats and wildlife. Additionally, sites within some protected parks, including the Similan islands, are closed off to visitors during monsoon season, in an effort to curb damage to the surrounding ecosystems.
Also, keep in mind to prioritize responsible tourism practices. Use reef-safe sunscreen, avoid touching or disturbing the coral formations, and choose reputable tour operators committed to conservation efforts to ensure the underwater world thrives for generations to come.