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Map of Blue Light Cave (Kakaban)
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ExpertBoat entry

Blue Light Cave (Kakaban)

East Kalimantan, Indonesia
2–44 m (7–144 ft) depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Blue Light Cave (Kakaban) at a glance

Blue Light Cave (Kakaban) is an expert boat dive site in East Kalimantan, Indonesia with depths of 2–44 m (7–144 ft). Typically most favorable Dec–Oct · from 3 years of archive data. Divers commonly see Glassfish, Soldierfish, and Reef fish (at entrance/exit). Recent reports put the water around 30°C (86°F). Check the latest conditions and entry details before you go.

Next window today· 6:00–18:00 · favorable · sunset 17:51

Forecast for this hour · 3:00 · run 1 h ago
0.2 m (0.8 ft)waves — under half a meter expected (waves — under a foot expected)

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 30°C ( · Forecast 86°F · seasonal avg 86°F)

Site hazards: Overhead environment, narrow chimney, significant depth, silt-out risk, no direct ascent

Read the full hazards ↓

Dive windows this week

Mon6:00–18:00 favorable

0.3 m waves · 7 kn wind (0.9 ft waves · 7 kn wind)

Tue6:00–18:00 favorable

0.3 m waves · 7 kn wind (1.0 ft waves · 7 kn wind)

Wed6:00–18:00 favorable

0.2 m waves · 3 kn wind (0.5 ft waves · 3 kn wind)

Thu6:00–18:00 favorable

0.1 m waves · 3 kn wind (0.5 ft waves · 3 kn wind)

Fri6:00–18:00 favorable

0.1 m waves · 5 kn wind (0.4 ft waves · 5 kn wind)

Sat6:00–18:00 favorable

0.2 m waves · 7 kn wind (0.6 ft waves · 7 kn wind)

Sun6:00–18:00 favorable

0.1 m waves · 5 kn wind (0.5 ft waves · 5 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 5:27 · Sunrise 5:48 · Sunset 17:51 · some windows run past sunset

Source: Open-Meteo marine · model point 8.3 km from site · updated 26 Oct, 01:19 GMT+8

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Blue Light Cave (Kakaban)

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: Glassfish, Reef fish (at entrance/exit), Sponges
Best time: Year-round in calm conditions

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, 100% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 0.4 m (1.1 ft), wind has typically been 11 knots, historically most favorable
  2. February, 100% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 0.4 m (1.3 ft), wind has typically been 12 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 0.4 m (1.3 ft), wind has typically been 12 knots, historically most favorable
  4. April, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 10 knots, historically most favorable
  5. May, 100% of days have historically been favorable, water has typically been 31°C (87°F), waves have typically been 0.2 m (0.7 ft), wind has typically been 9 knots, historically most favorable
  6. June, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.2 m (0.8 ft), wind has typically been 10 knots, historically most favorable
  7. July, 100% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 0.4 m (1.2 ft), wind has typically been 12 knots, historically most favorable
  8. August, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.3 m (1.0 ft), wind has typically been 11 knots, historically most favorable
  9. September, 100% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 0.3 m (1.0 ft), wind has typically been 11 knots, historically most favorable
  10. October, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.2 m (0.7 ft), wind has typically been 10 knots, historically most favorable
  11. November, 99% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.3 m (0.8 ft), wind has typically been 10 knots
  12. December, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 11 knots, historically most favorable

January, February, March, April, May, June, July, August, September, October, 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.

  • Galaxea fascicularis recorded here Jun (1 record)

    most recent 2013

  • Madrepora arbuscula recorded here Jun (1 record)

    most recent 2013

  • Maiden Goby recorded here Jun (1 record)

    Valenciennea puellarismost recent 2013

  • Pavona minuta recorded here Jun (1 record)

    most recent 2013

Newest record here: 2013. 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 June 2026

Site details

A technical cavern dive on Kakaban island that begins at a crack about 2 m deep and descends through a narrow chimney. Around 21 m the chimney opens into a large cavern extending roughly 120 m, exiting through a long vertical crack in the wall at about 44 m. The name comes from the striking blue glow of the sea seen from within the cavern; it is a deep overhead-environment dive for experienced divers only.

boatcavewall

Overhead environment, narrow chimney, significant depth, silt-out risk, no direct ascent

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