Indonesian Regions Entering Dry Season in June 2026: Which Areas are Affected?

Information regarding which regions are entering the dry season is vital for both the public and local governments as a basis for anticipating changes in weather conditions. So, which areas are expected to begin experiencing the dry season this June?

According to the 2026 Dry Season Prediction Book, BMKG explains that the onset of the dry season in Indonesia does not occur simultaneously. Out of a total of 699 Seasonal Zones (ZOM), most regions are predicted to enter the dry season gradually between April and June 2026.

BMKG notes that 163 ZOM, or approximately 23.3 per cent of Indonesia’s seasonal areas, are predicted to begin experiencing the dry season in June 2026. Prior to this, the dry season had already developed in several regions during April and May 2026.

Based on the 2026 Dry Season Prediction Book released by BMKG, the regions predicted to enter the dry season in June 2026 include:

• Most of Aceh

• Parts of North Sumatra

• West Sumatra

• Riau

• Parts of Jambi

• Parts of Bengkulu

• Bangka Belitung Islands

• Parts of South Sumatra

• Small parts of Lampung

• Small parts of Java

• Most of Kalimantan

• Parts of North Sulawesi

• Northern Gorontalo

• Parts of West Sulawesi

• Parts of Central Sulawesi

• Small parts of South Sulawesi

• Parts of Southeast Sulawesi

• Parts of Maluku

• Parts of West Papua

• Eastern Papua

BMKG stated that these areas are part of the 163 seasonal zones expected to enter the dry period throughout June 2026.

Furthermore, BMKG predicts that the character of this year’s dry season tends to be drier than normal conditions. In its report, 451 ZOM, or 64.5 per cent of Indonesia’s seasonal areas, are expected to experience a dry season category below normal.

The ‘below normal’ category indicates that the accumulation of rainfall during the dry season is lower than the climatological average. This condition has the potential to increase the risk of drought in several regions if not anticipated early.

Additionally, BMKG estimates that most of Indonesia will experience the peak of the dry season in August 2026. It is recorded that 429 ZOM, or 61.4 per cent of seasonal areas, are predicted to reach the peak of the dry season in that month.

BMKG urges various sectors to utilise seasonal prediction information for planning and mitigation purposes, including the agriculture, water resources, energy, environment, and disaster management sectors.