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Map of Cystal Rock Dive Site
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Cystal Rock Dive Site

East Nusa Tenggara, IndonesiaDirections
Rash guard or 2mm shorty typical

Cystal Rock Dive Site at a glance

Cystal Rock Dive Site is a dive site in East Nusa Tenggara, Indonesia. Typically most favorable Feb–Dec · from 3 years of archive data. Divers commonly see Kuhl's Maskray, Eyestripe Surgeonfish, and Bigeye Barracuda. Recent reports put the water around 29°C (85°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:56

Forecast for this hour · 7:00 · run 5 h ago
0.2 m (0.6 ft)waves — under half a meter expected (waves — under a foot expected)

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

Dive windows this week

Mon6:00–18:00 favorable

0.2 m waves · 4 kn wind (0.6 ft waves · 4 kn wind)

Tue6:00–18:00 favorable

0.2 m waves · 4 kn wind (0.5 ft waves · 4 kn wind)

Wed6:00–18:00 favorable

0.1 m waves · 4 kn wind (0.5 ft waves · 4 kn wind)

Thu6:00–18:00 favorable

0.2 m waves · 6 kn wind (0.7 ft waves · 6 kn wind)

Fri6:00–18:00 favorable

0.2 m waves · 3 kn wind (0.7 ft waves · 3 kn wind)

Sat6:00–18:00 favorable

0.2 m waves · 3 kn wind (0.6 ft waves · 3 kn wind)

Sun6:00–18:00 favorable

0.1 m waves · 3 kn wind (0.5 ft waves · 3 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 5:13 · Sunrise 5:34 · Sunset 17:56 · some windows run past sunset

Source: Open-Meteo marine · model point 9.7 km from site · updated 26 Oct, 01:21 GMT+8

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Cystal Rock Dive Site

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: Whitetip Reef Shark, Blacktip Reef Shark

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.

  1. January, 99% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.7 m (2.2 ft), wind has typically been 9 knots
  2. February, 100% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.7 m (2.2 ft), wind has typically been 9 knots, historically most favorable
  3. March, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.5 m (1.8 ft), wind has typically been 8 knots, historically most favorable
  4. April, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.5 m (1.5 ft), wind has typically been 8 knots, historically most favorable
  5. May, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.6 m (1.8 ft), wind has typically been 11 knots, historically most favorable
  6. June, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.6 m (2.0 ft), wind has typically been 11 knots, historically most favorable
  7. July, 100% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.7 m (2.3 ft), wind has typically been 13 knots, historically most favorable
  8. August, 100% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 0.6 m (2.0 ft), wind has typically been 11 knots, historically most favorable
  9. September, 100% 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 10 knots, historically most favorable
  10. October, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.5 m (1.6 ft), wind has typically been 9 knots, historically most favorable
  11. November, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.4 m (1.3 ft), wind has typically been 8 knots, historically most favorable
  12. December, 100% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 0.6 m (1.9 ft), wind has typically been 9 knots, historically most favorable

February, March, April, May, June, July, August, September, October, November, and December 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.

  • Whitetip Reef Shark recorded here May, Jul, Sep–Oct, Dec (9 records)

    Triaenodon obesusmost recent 2018

  • Humphead Wrasse recorded here Jul–Sep, Dec (5 records)

    Cheilinus undulatusmost recent 2018

  • Blacktip Reef Shark recorded here May, Dec (4 records)

    Carcharhinus melanopterusmost recent 2018

  • Bicolor Angelfish recorded here Dec (2 records)

    Centropyge bicolormost recent 2018

  • Clown Triggerfish recorded here Dec (2 records)

    Balistoides conspicillummost recent 2018

  • Eyestripe Surgeonfish recorded here Dec (2 records)

    Acanthurus dussumierimost recent 2018

  • Giant Manta recorded here Dec (2 records)

    Mobula birostrismost recent 2018

  • Giant Moray recorded here Dec (2 records)

    Gymnothorax javanicusmost recent 2018

Newest record here: 2018. 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.

Data updated July 2026

Site details

A dive site in Indonesia.

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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