Richelieu Rock is a dive site in Thailand. Typically most favorable Apr · from 3 years of archive data. Divers commonly see Platax orbicularis, Penaeus duorarum, and Heniochus acuminatus. Recent reports put the water around 29°C (85°F). Check the latest conditions and entry details before you go.
Tap a factor for its source and model point · Forecast 29°C · seasonal avg 29°C
Dive windows this week
Best: SatFavorable windowModerate window— no window
First light 5:57 · Sunrise 6:18 · Sunset 18:30
Source: Open-Meteo marine · model point 7.1 km from site · graded 1h ago
Forecast only — always assess conditions on site.
Dated firsthand observations from divers — not current conditions.
No diver reports for this site yet. — one dated observation helps every diver after you.
Based on community reviews and site data. Conditions vary — always verify before diving.
What conditions have historically been typical at this site, month by month — not a forecast.
April and October havetypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.
Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.
Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.
Orbiculate BatfishPlatax orbicularisOccasionally seen
Pink shrimpPenaeus duorarumOccasionally seen
GTCaranx ignobilisOccasionally seen
Pacific CornetfishFistularia cornetaOccasionally seen
Barred SpinefootSiganus doliatusCommonly seen
Scarlet cleaner shrimpLysmata amboinensisOccasionally seen
Rosy StarfishStichastrella roseaOccasionally seenGymnothorax javanicus recorded here Mar (3 records)
most recent 2016
Amphiprion ocellaris recorded here Mar (2 records)
most recent 2016
Diadema antillarum recorded here Mar (2 records)
most recent 2016
Gnathanodon speciosus recorded here Mar (2 records)
most recent 2016
Odonus niger recorded here Mar (2 records)
most recent 2016
Pterois volitans recorded here Mar (2 records)
most recent 2016
Scarus rubroviolaceus recorded here Mar (2 records)
most recent 2016
Scorpaenodes albaiensis recorded here Mar (2 records)
most recent 2016
Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.
No dive shops mapped within 25 km. Know one? Add it to the map.
Featured Thailand guide
Richelieu Rock is a remote Andaman Sea pinnacle associated with colorful reef life, seasonal park access, liveaboards, and the chance of larger pelagic encounters. This guide turns that reputation into practical planning questions.
PickADive guides and forecast windows are planning context, not a safety clearance. Confirm current conditions, rules, training limits, and operator guidance before diving — the decision is yours.
Richelieu Rock deserves a guide because it has a specific logistics profile. Divers need to understand boat access, seasonal closures, current, depth, and why sightings of whale sharks or mantas should be treated as possible, not promised.
Research it as a boat-access pinnacle, often reached through liveaboard or long day-trip operations. Confirm marine-park season, operator route, currents, number of dives planned, maximum depth, and whether the day suits your buoyancy and current comfort.
The site is researched for dense reef life, macro subjects, schooling fish, and occasional larger pelagics. The most satisfying plan is one that values the whole pinnacle rather than chasing one headline sighting.
The Surin Islands marine-park season and Andaman Sea weather shape access. Many divers focus on the drier months, but exact availability and conditions should be checked with operators before travel.
Current, depth changes around the pinnacle, boat traffic, reef contact, and crowded high-season dives are the main risks. Stay close to the guide and protect the reef.
Ask if Richelieu Rock is guaranteed on the itinerary or condition-dependent, and what alternate sites are used if weather, park status, or current changes the plan.
Some operators may offer long day trips, while many divers visit by liveaboard. Confirm the current route and travel time before booking.
No. Whale shark and manta encounters are possible but never guaranteed. Choose the site for the full pinnacle experience.
Access can be affected by marine-park season and weather. Check current operator and park guidance before planning travel around one site.
Buoyancy control and comfort with current matter more than chasing depth. Good positioning protects both the diver and the reef.
Data updated July 2026
A dive site in Thailand.
No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.
Divers at Richelieu Rock in Thailand commonly report sightings of Platax orbicularis, Penaeus duorarum, Heniochus acuminatus, Gnathanodon speciosus, and Odonus niger. Gnathanodon speciosus and Odonus niger are recorded as common sightings, while Platax orbicularis, Penaeus duorarum, and Heniochus acuminatus are reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.
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