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Rain still pours across Indonesia with ‘wet dry season’ expected until June
Several climate and weather phenomena have triggered a late start to this year’s dry season in Indonesia, leading several regions to see thunderstorms and torrential rains until early June, as forecasted fby the Meteorology, Climatology and Geophysics Agency (BMKG).
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Players of the Persita Tangerang and PSBS Biak soccer clubs play under the rain on May 3, 2025, during a Liga 1 soccer league match at the Indomilk Arena Stadium in Tangerang regency, Banten. Officials suspended the match in the 47th minute because of heavy rain. (Antara/Galih Pradipta)
W
hile Indonesia typically starts entering the dry season around April, heavy rainfall has continued in most parts of the country in the past few weeks, with the “wet dry season” expected to last until early June.
Earlier this year, the Meteorology, Climatology and Geophysics Agency (BMKG) forecasted that Indonesia would see a normal dry season that would start in most areas in April and was expected to reach its peak between June and August.
A normal dry season occurs when there is not a dominant El Niño weather pattern. El Niño tends to bring drier air to the archipelago, resulting in a prolonged dry season.
But in its latest reports, the weather agency forecasted that the dry season would start later in some areas. It will also be shorter in most regions.
In a forecast report issued on Thursday, BMKG recorded that 73 percent of the archipelago is still experiencing a wet season, which usually falls from October to April. Most regions see clear weather between morning and early afternoon, followed by thunderstorms that last until the evening.
“The weather dynamics in most parts of Indonesia show a transitional period between the rainy and dry season, which is locally known as pancaroba,” the agency wrote.
The wetter start of the dry season could be attributed to some atmospheric phenomena, such as Madden-Julian Oscillation (MJO), a moving pulse of wind, cloud and atmospheric pressure that brings extra water vapor to form clouds in the sky.
