Because the Andaman Sea is part of the Indian Ocean, between May and October the National Marine Parks on Thailand’s west coast are closed for the monsoon season. Most of our Similan Island liveaboard boats stop operating for five months, and spend time moored in a harbour waiting for the new season to begin. But some boats choose to continue running trips from May through to the end of August, then they go into dry dock in September. Even though the National Marine Parks are closed, The Junk and Giamani offer weekend trips to the best dive sites around Phuket and Koh Phi Phi, and are also available during the week. We also have Gentle Giant available for long-weekend full charters.