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Anak Krakatoa

Island

Formed inside Krakatoa's caldera, Anak Krakatoa is an active volcanic cone; visitors take boat trips from Lampung for close volcanic views and, when allowed, guided landings or hikes.

Anak Krakatoa Pulau WehBanda AcehBukit LawangMedanBerastagiLake TobaNiasBukittinggiPadangMentawai IslandsMount KerinciBatamPalembangBandar LampungKrakatauAnak Krakatoa
In this guide

Anak Krakatoa essentials

Country: Indonesia
Driest months: Jul-Sep
Pay in: Rupiah (Rp)
Language: Indonesian
Emergency: 110

Anak Krakatoa at a Glance

About Anak Krakatoa

Anak Krakatoa is a volcanic island in the Sunda Strait, Lampung province, Indonesia, that emerged from the Krakatoa caldera in 1927 and has been intermittently active since. It occupies a position between the islands of Java and Sumatra and is part of the Sunda volcanic arc.

The island is a steep volcanic cone with frequently changing shorelines and active vents; it is typically observed from boats or aircraft rather than visited on foot due to unstable terrain and ongoing risk. A major eruptive event and partial flank collapse in December 2018 produced a tsunami in the surrounding coastlines and significantly altered the island’s summit and coastline.

Anak Krakatoa arose from the sea after the catastrophic 1883 eruption of Krakatoa and has been a site of repeated eruptive episodes through the 20th and 21st centuries, building and sometimes losing volcanic mass in successive eruptions. Monitoring by Indonesian volcanic authorities remains active due to its persistent activity.

The island sits in the Sunda Strait between Java and Sumatra in western Indonesia; the nearest large administrative centre is Bandar Lampung on Sumatra’s southern coast, and access is normally by boat from nearby ports.

  • Access and safety: The island is active and conditions change rapidly; close approaches by boat are sometimes prohibited for safety following eruptive activity.
  • Origins: Formed within the caldera produced by the 1883 Krakatoa eruption, it rose above sea level and has been growing intermittently since its first emergence in 1927.
Things to Do
When to Go

Best Time to Visit Anak Krakatoa

If attempting to view Anak Krakatoa from a distance, the dry season (April-October) usually offers calmer seas and better access-but always verify local safety notices due to volcanic activity.

Dry season
April-October · 24-31°C
Calmer seas and more stable weather make boat access more likely; nevertheless, check local advisories because the volcano is active and access can be restricted.
Wet season
November-March · 24-31°C
Heavier rain, rougher seas and increased chance of closures; strong caution is advised and trips may be canceled for safety due to volcanic activity and sea conditions.

Weather & Climate near Anak Krakatoa

Climate

Tropical climate with consistently warm temperatures year-round. Temperatures range from 23°C to 31°C. Heavy rainfall (2653 mm/year), wettest in January.

Air Quality: AQI 55 Moderate
Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
32°
Warmest Month
23°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Good 24° - 29° 27° 329 mm overcast 83% 2.5 m/s 2.3 extreme 12.3h
February Good 24° - 29° 27° 289 mm overcast 84% 2.5 m/s 2.4 extreme 12.2h
March Good 24° - 30° 27° 266 mm overcast 83% 2.1 m/s 2.4 extreme 12.0h
April Good 24° - 30° 31° 225 mm overcast 83% 2.0 m/s 2.2 extreme 11.9h
May Very Good 24° - 31° 31° 193 mm partly cloudy 81% 1.9 m/s 1.9 very high 11.7h
June Very Good 24° - 30° 30° 146 mm partly cloudy 80% 2.2 m/s 1.8 very high 11.6h
July Very Good 23° - 30° 27° 111 mm partly cloudy 79% 2.5 m/s 1.9 very high 11.7h
August Excellent 23° - 30° 26° 122 mm some cloud 77% 3.3 m/s 2.2 extreme 11.8h
September Very Good 23° - 30° 27° 144 mm partly cloudy 76% 3.2 m/s 2.3 extreme 12.0h
October Good 24° - 30° 27° 215 mm overcast 78% 2.4 m/s 2.2 extreme 12.1h
November Good 24° - 30° 27° 300 mm overcast 80% 2.1 m/s 2.2 extreme 12.3h
December Good 24° - 30° 27° 313 mm overcast 83% 2.4 m/s 2.1 extreme 12.4h
Getting There & Around

How to Get to Anak Krakatoa

Anak Krakatoa is an island volcano in the Sunda Strait and has no regular land access - it is reached only by boat. Charter boats and organised tour boats depart from West Java ports such as Carita/Anyer and from Lampung/Kalianda on Sumatra; schedules and crossing times vary and sea conditions can make access difficult. There are no roads or public transport onto the volcano itself.

Tips for Visiting Anak Krakatoa

  • Do not attempt an independent landing; approach Anak Krakatoa only with an organized boat tour and follow local authorities - landings are often prohibited and conditions can change rapidly due to volcanic activity.
  • Check the Indonesian volcanological agency (PVMBG) alert level and recent activity reports before booking any trip; operators will cancel or alter routes when the volcano is active.
  • Plan sea-viewing trips for early morning when the water is usually calmer and visibility is better, and make sure your operator keeps a safe standoff distance rather than attempting to go ashore.