What will I see at Richelieu Rock?

Divers at Richelieu Rock in Thailand commonly report sightings of Orbiculate Batfish, Pink shrimp, Pennant Coral Fish, Golden Trevally, and Redtooth Triggerfish. Golden Trevally and Redtooth Triggerfish are recorded as common sightings, while Orbiculate Batfish, Pink shrimp, and Pennant Coral Fish are reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

Richelieu Rock

ThailandDirections

Rash guard or 2mm shorty typical

Richelieu Rock at a glance

Richelieu Rock is a dive site in Thailand. Typically most favorable Apr · from 3 years of archive data. Divers commonly see Orbiculate Batfish, Pink shrimp, and Pennant Coral Fish. Recent reports put the water around 30°C (87°F). Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:06

Forecast for this hour · 18:00 · run 17 h ago

0.6 m (2.0 ft)waves — under a meter expected (waves — about two feet expected)

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 29°C ( · Forecast 87°F · seasonal avg 85°F)

Dive windows this week

Mon

0.7 m waves · 4 kn wind (2.1 ft waves · 4 kn wind)

Tue

0.5 m waves · 7 kn wind (1.5 ft waves · 7 kn wind)

Wed

0.4 m waves · 7 kn wind (1.2 ft waves · 7 kn wind)

Thu

0.5 m waves · 6 kn wind (1.6 ft waves · 6 kn wind)

Fri

0.4 m waves · 8 kn wind (1.2 ft waves · 8 kn wind)

Sat

0.3 m waves · 4 kn wind (1.1 ft waves · 4 kn wind)

Sun

0.3 m waves · 4 kn wind (0.9 ft waves · 4 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 5:55 · Sunrise 6:16 · Sunset 18:06 · some windows run past sunset

Source: Open-Meteo marine · model point 7.1 km from site · updated 26 Oct, 00:25 GMT+7

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Richelieu Rock

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Golden Trevally, Redtooth Triggerfish, Ember Parrotfish

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

January, 91% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 0.6 m (1.9 ft), wind has typically been 16 knots
February, 91% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.5 m (1.7 ft), wind has typically been 15 knots
March, 98% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 0.4 m (1.4 ft), wind has typically been 13 knots
April, 100% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.4 m (1.4 ft), wind has typically been 11 knots, historically most favorable
May, 94% of days have historically been favorable, water has typically been 31°C (87°F), waves have typically been 0.8 m (2.5 ft), wind has typically been 13 knots
June, 69% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 16 knots
July, 65% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.2 m (3.8 ft), wind has typically been 18 knots
August, 82% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 15 knots
September, 68% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.1 m (3.7 ft), wind has typically been 16 knots
October, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.6 m (2.1 ft), wind has typically been 11 knots, historically most favorable
November, 88% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.6 m (1.9 ft), wind has typically been 14 knots
December, 95% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.6 m (2.0 ft), wind has typically been 15 knots

April and October have typically 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.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Giant Moray recorded here Mar (3 records)
Gymnothorax javanicusmost recent 2016
Barred Spinefoot recorded here Mar (2 records)
Siganus doliatusmost recent 2016
Clown Anemonefish recorded here Mar (2 records)
Amphiprion ocellarismost recent 2016
Ember Parrotfish recorded here Mar (2 records)
Scarus rubroviolaceusmost recent 2016
Golden Trevally recorded here Mar (2 records)
Gnathanodon speciosusmost recent 2016
Java Rabbitfish recorded here Mar (2 records)
Siganus javusmost recent 2016
Lionfish recorded here Mar (2 records)
Pterois volitansmost recent 2016
Long-spined Urchin recorded here Mar (2 records)
Diadema antillarummost recent 2016

Newest record here: 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.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Featured Thailand guide

Richelieu Rock dive 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.

Open map Check conditions Compare nearby sites Read reviews

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.

Difficulty: Intermediate
Access: Boat/liveaboard
Best for: Pinnacle reef life
Planning note: Seasonal access
Depth: Depth varies; Confirm your plan against current conditions and training.
Best time: Check conditions close to the dive; Forecasts and local observations can change quickly.

Why dive Richelieu Rock

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.

How to dive it

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.

Marine life and site character

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.

Best season and conditions

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.

Hazards and diver readiness

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.

Local tips

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.

Common questions about Richelieu Rock

Can I dive Richelieu Rock as a day trip?

Some operators may offer long day trips, while many divers visit by liveaboard. Confirm the current route and travel time before booking.

Are whale sharks guaranteed at Richelieu Rock?

No. Whale shark and manta encounters are possible but never guaranteed. Choose the site for the full pinnacle experience.

Is Richelieu Rock open all year?

Access can be affected by marine-park season and weather. Check current operator and park guidance before planning travel around one site.

What skill matters most here?

Buoyancy control and comfort with current matter more than chasing depth. Good positioning protects both the diver and the reef.

Data updated July 2026

Site details

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.

Reviews

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