Similan Islands Closed Until 15 October 2025

Similan Islands with cloudy skies in May 2025

The Similan Islands are closed for the 2025 monsoon season from 15 May to 15 October. Weather disruptions began as early as April, impacting diving conditions and liveaboard schedules. Despite rougher seas, underwater productivity remained high and coral bleaching was avoided, with continued signs of reef recovery across the region.