Ijen Crater is an active volcano in East Java renowned for its mesmerizing "Blue Fire," a natural phenomenon caused by ignited sulfuric gases rising from volcanic cracks. It features the world's largest highly acidic crater lake and is home to miners who harvest sulfur blocks by hand under challenging conditions.
Visit to trek under the stars, witness the electric blue flames inside the active crater, and watch a dramatic sunrise over the turquoise acid lake.
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Best months: Aug
This destination has a temperate climate with temperatures ranging from 11°C to 18°C annually. Best visited during Aug. Avoid travel in Jan, Feb, Mar, Nov, Dec due to heavy rainfall.
⚠️ Avoid travelling in Jan, Feb, Mar, Nov, Dec due to extreme conditions.
Plan a trip for AugClimate averages based on 10-year historical data · Open-Meteo