Lake Segara Anak Lake
Crater lake inside Mount Rinjani caldera
Crater lake Segara Anak sits in Mount Rinjani's caldera on Lombok; trekkers come for multi‑day climbs, camping by the lake, hot springs and sunrise views across volcanic ridges.
Lake Segara Anak at a Glance#
About Lake Segara Anak#
Lake Segara Anak is the large crater lake that occupies the caldera of Mount Rinjani on the island of Lombok, West Nusa Tenggara, Indonesia. The lake lies at high elevation within an active volcanic system and is a central feature of the Rinjani National Park area.
Hikers and climbers access the lake as part of multi-day treks to the Rinjani summit; routes commonly approach from the Senaru or Sembalun valleys. The lake contains a prominent volcanic cone and nearby hot springs are visited by trekkers; camping areas around the caldera rim offer panoramic views of the crater.
The caldera and lake formed through past explosive eruptions of Mount Rinjani; subsequent volcanic activity built an inner cone that emerges from the water. The site remains volcanically active and is monitored by Indonesian geological agencies.
The lake sits within the Mount Rinjani caldera on Lombok island; the nearest trailheads are in the foothill villages (Senaru and Sembalun) at the base of the mountain.
- Elevation: Sits roughly 2,000 meters above sea level, inside the caldera of Mount Rinjani on Lombok.
- Volcanic cone: Contains an active volcanic cone that rises from the lake surface and is a visible focal point within the caldera.
What to See#
- Gunung Barujari: A volcanic cone rising from the crater lake that is active on a geological timescale and has produced eruptions in recent centuries. The cone forms a shallow island within the lake and is a prominent landmark for visitors and scientists.
How to Get to Lake Segara Anak#
Segara Anak sits within Mount Rinjani National Park on Lombok. Treks to the lake typically start from Senaru (north side) or Sembalun (east side) villages-both require guided multi-day treks. The nearest airport is Lombok International (LOP); from there, travel to Senaru or Sembalun by car (2-3 hours) before beginning the climb.
Tips for Visiting Lake Segara Anak#
- If hiking to Segara Anak, hire a licensed local guide-trail conditions can change and there are volcanic hazards.
- Plan climbs with an extra acclimatisation day if arriving from sea level-altitude at the caldera rim is roughly 2,300 m.
- Respect local sacred sites: Rinjani and its crater lake are culturally important to Sasak and Balinese pilgrims.
Best Time to Visit Lake Segara Anak#
Segara Anak in Mount Rinjani's caldera is best visited in the dry season (May-September) for safer trekking and clearer views; outside these months trails can be dangerous.
Weather & Climate near Lake Segara Anak#
Lake Segara Anak's climate is classified as Subtropical Highland (Dry Winter) - Subtropical Highland (Dry Winter) climate with consistently warm temperatures year-round. Temperatures range from 9°C to 19°C. Heavy rainfall (2190 mm/year), wettest in January with a pronounced dry season.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Acceptable | 10° - 18° | 14° | 445 mm | overcast | 85% | 3.2 m/s | 2.4 extreme | 12.4h |
| February | Acceptable | 10° - 18° | 14° | 392 mm | overcast | 85% | 2.8 m/s | 2.5 extreme | 12.3h |
| March | Acceptable | 11° - 19° | 15° | 350 mm | partly cloudy | 84% | 2.7 m/s | 2.5 extreme | 12.0h |
| April | Good | 11° - 18° | 15° | 168 mm | partly cloudy | 82% | 2.9 m/s | 2.4 extreme | 11.8h |
| May | Very Good | 11° - 19° | 15° | 82 mm | some cloud | 82% | 3.2 m/s | 2.1 extreme | 11.6h |
| June | Very Good | 10° - 18° | 14° | 47 mm | mostly sunny | 81% | 3.0 m/s | 1.9 very high | 11.5h |
| July | Very Good | 9° - 18° | 14° | 35 mm | mostly sunny | 79% | 2.4 m/s | 2.0 very high | 11.6h |
| August | Excellent | 9° - 18° | 14° | 24 mm | mostly sunny | 76% | 3.3 m/s | 2.3 extreme | 11.7h |
| September | Excellent | 10° - 19° | 15° | 33 mm | mostly sunny | 74% | 3.5 m/s | 2.6 extreme | 11.9h |
| October | Very Good | 11° - 19° | 15° | 73 mm | some cloud | 74% | 3.5 m/s | 2.7 extreme | 12.2h |
| November | Good | 11° - 19° | 15° | 175 mm | partly cloudy | 78% | 3.4 m/s | 2.6 extreme | 12.4h |
| December | Acceptable | 11° - 19° | 15° | 366 mm | overcast | 83% | 3.0 m/s | 2.4 extreme | 12.5h |
