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Map of Sangalaki Manta Run
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Boat entry

Sangalaki Manta Run

East Kalimantan, Indonesia
Open Water suggested3–20 m (10–66 ft) depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Sangalaki Manta Run at a glance

Sangalaki Manta Run is a boat dive site in East Kalimantan, Indonesia with depths of 3–20 m (10–66 ft). Typically most favorable Dec–Oct · from 3 years of archive data. Divers commonly see Green sea turtle, Eagle ray, and Nudibranch. Recent reports put the water around 30°C (87°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:52

Forecast for this hour · 12:00 · run 23 h ago
0.1 m (0.4 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 87°F · seasonal avg 86°F)

Site hazards: Mild current, plankton can reduce visibility, do not touch or chase mantas

Read the full hazards ↓

Dive windows this week

Sun6:00–18:00 favorable

0.1 m waves · 6 kn wind (0.4 ft waves · 6 kn wind)

Mon6:00–18:00 favorable

0.2 m waves · 9 kn wind (0.6 ft waves · 9 kn wind)

Tue6:00–18:00 favorable

0.2 m waves · 8 kn wind (0.7 ft waves · 8 kn wind)

Wed6:00–18:00 favorable

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

Thu6:00–18:00 favorable

0.1 m waves · 3 kn wind (0.4 ft waves · 3 kn wind)

Fri6:00–18:00 favorable

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

SatNot in the forecast yet

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 17:52 · some windows run past sunset

Source: Open-Meteo marine · model point 4.2 km from site · updated 24 Oct, 13:20 GMT+8

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Sangalaki Manta Run

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: Green sea turtle, Reef fish, Reef manta ray
Best time: Year-round; mantas present all year

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 seen at this site

Species noted at this site — 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.

The underwater calendar

When these animals are most recorded around Coral Triangle & Southeast Asia — from open sighting data, not a promise.

Watch the whole year animate on the Migrations map

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 shallow plankton-rich plateau off Sangalaki island where reef manta rays congregate year-round to feed and visit cleaning stations, frequently seen barrel-rolling at 5 to 15 m. The island is also a major green-turtle nesting site, so turtles are a near-constant presence. An easy, magical site that is one of the Derawan archipelago's signature dives.

boatreef

Mild current, plankton can reduce visibility, do not touch or chase mantas

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