Siam Bay
Thailand / Ko Racha Yai
Siam Bay is a reef diving and wreck diving dive site lead in Ko Racha Yai, Thailand. The reference depth is 6-18 m, entry is usually by shore dive, and the planning level is OW and above. The source card points to a profile suited to reef diving and wreck diving, so WhereDive treats it as a planning lead rather than a fully surveyed site record. Confirm tide, visibility, and guide briefing before adding it to an itinerary.
Recommended level
OW
Recommended dives
10+
Max depth
18 m
Average depth
12 m
Current
Mild
Visibility
10-28 m
Water temperature
27-30°C
Best months
Jan, Feb, Mar, Apr, Nov, Dec
Best for
Highlights
- • Ko Racha Yai dive-site lead for reef diving and wreck diving
- • Reference depth: 6-18 m
- • Entry: shore dive
- • Recommended months: Jan, Feb, Mar, Apr, Nov, Dec
- • Likely highlights: coral gardens
What this page helps you answer
If you are comparing Siam Bay by depth, current, visibility, diver level, and itinerary fit, this page gives a faster planning summary than a simple site name list.
Marine life
Dive types
Safety notes
- • Plan conservatively around the 6-18 m reference depth and stay within certification limits.
- • Treat current as mild, but follow tide, captain, and guide briefings on the day.
- • shore dive requires confirming entry, exit, and backup procedures before the dive.
- • This record is reference-derived; verify depth, visibility, and suitability with a local operator before diving.
- • Entry type: Shore.
- • Adjust depth and route based on local guide judgment.
Map and coordinates
Siam Bay
7.618, 98.370
Continue with related pages
Ko Racha Yai destination guide
Review Ko Racha Yai by season, diver level, and signature sites before deciding where Siam Bay fits in the trip.
Ko Racha Yai dive sites
Compare Siam Bay with other Ko Racha Yai dive sites by current, depth, and best months.
Beginner-friendly dive sites
If you still need an OW-friendlier shortlist, this topic page is a quicker starting point.
Nearby dive sites
Bungalow Bay
Thailand / Ko Racha Yai
- Max depth
- 25 m
- Best months
- Jan, Feb, Mar, Apr, Nov, Dec
- • Ko Racha Yai dive-site lead for reef diving
- • Reference depth: 15-25 m
Do little Do
Thailand / Ko Racha Yai
- Max depth
- 30 m
- Best months
- Jan, Feb, Mar, Apr, Nov, Dec
- • Ko Racha Yai dive-site lead for wreck diving
- • Reference depth: 5-30 m
Homerun Reef
Thailand / Ko Racha Yai
- Max depth
- 20 m
- Best months
- Jan, Feb, Mar, Apr, Nov, Dec
- • Ko Racha Yai dive-site lead for reef diving and macro photography
- • Reference depth: 3-20 m
FAQ
Is this dive site suitable for OW divers? +
Siam Bay is relatively suitable for OW divers, but conditions and guide decisions still matter.
What are the best months to dive here? +
The recommended months for Siam Bay are Jan, Feb, Mar, Apr, Nov, Dec. Confirm current local conditions before booking.
Is the current strong here? +
The current rating is Mild. Tide and operator judgment should guide the final decision.
What marine life can be seen? +
Common highlights include coral.