Siam Bay
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
Dived here today? How were conditions vs. what we showed?
About this site
Siam Bay sits on Racha Yai Island, off the southern coast of Phuket in the Andaman Sea. Racha Yai is a common day trip and dive boat destination from Phuket, with several bays around the island used as anchor points for shore and boat access. The site has a reef bottom reaching a maximum depth of about 25 metres, rated as a beginner dive with light current and good visibility. Divers have also reported moray eels, pufferfish, and stingrays around the bay.
AI overviewMarine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Moray eelMoray eelReported here · unconfirmed
StingrayStingrayReported here · unconfirmed
Guam ScorpionfishScorpaenodes guamensisReported here · unconfirmed
Moon WrasseThalassoma lunareReported here · unconfirmed
PufferfishPufferfishReported here · unconfirmed
Moorish IdolZanclus cornutusObserved near here · iNaturalist
Blue LinckiaLinckia laevigataObserved near here · iNaturalist
Tawny Hermit CrabCoenobita rugosusObserved near here · iNaturalist
Indo-Pacific Sergeant MajorAbudefduf vaigiensisObserved near here · iNaturalist
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
No notes yet. Dived here? Be the first to leave a tip.
Share a write-up or a photo. Submissions are reviewed before they appear on the page.
Nearby dive sites
Shops that dive here
No shops have listed this site yet.