East Java is one of several regions in Indonesia, with temperatures that range from 32°C (90°F) in February to 35°C (95°F) during the peak of October. We've based our full climate overview on data from Surabaya, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
Year-round, East Java, especially Surabaya, sees high temperatures, with maximum averages consistently above 32°C (90°F).
The peak heat season generally takes place in September, October and November.
Precipitation in East Java varies considerably throughout the year. The wettest conditions occur in February with 303 mm (12 in) of rain, while August stays relatively dry with 8 mm (0.3 in). The region experiences its rainy season during January, February, March, April and December, when monthly rainfall can range from 196 mm (7.7 in) to 303 mm (12 in). August marks the driest time of year, with rainfall falling below 8 mm (0.3 in).
Visitors hoping to maximize their time in the sun should consider planning their trip for August, when daylight hours are at their peak.
