The Meteorology, Climatology, and Geophysics Agency (BMKG) has warned of potential rain with varying intensities across various Indonesian regions on Tuesday, December 23, 2025. The government, through Cabinet Secretary Teddy Indra Wijaya, met with the BMKG head to discuss year-end weather forecasts and weather modification options to reduce risks of heavy rain during national holidays.
The Meteorology, Climatology, and Geophysics Agency (BMKG) issued a weather alert on Tuesday, December 23, 2025, stating that rain is likely to affect most of Indonesia with light to moderate intensities. BMKG forecaster Ranika Asti delivered this forecast via a broadcast in Jakarta, highlighting cloudy to rainy conditions in Sumatra, including light rain in Medan, Tanjung Pinang, and Padang, and moderate rain in Bengkulu. Areas like Banda Aceh, Pekanbaru, Jambi, and Pangkalpinang are expected to have thick clouds, while light rain in Palembang and thunder-accompanied rain in Bandar Lampung require caution.
On Java, light rain is possible in Serang, Jakarta, Bandung, and Surabaya, with moderate rain in Semarang and thick clouds in Yogyakarta. In Kalimantan, light rain is forecast for Pontianak, Samarinda, and Banjarmasin, while thunder rain needs watching in Palangkaraya and Tanjung Selor. Bali and Nusa Tenggara face light rain in Denpasar and Mataram, with thunder potential in Kupang. Sulawesi expects light rain in Makassar, Kendari, and Palu, moderate rain in Mamuju, thunder rain in Manado, and thick clouds in Gorontalo. Eastern Indonesia areas like Ternate, Ambon, Sorong, Manokwari, Nabire, Jayawijaya, and Jayapura may see light rain, with moderate rain in Merauke.
The day before, on Monday, December 22, 2025, Cabinet Secretary Teddy Indra Wijaya met BMKG Head Teuku Faisal Fathani in Jakarta to discuss rainfall forecasts during the year-end holidays. The meeting emphasized increased rain potential in strategic areas like Sumatra, Java, Bali, and Nusa Tenggara, driven by global atmospheric phenomena and cyclone seeds, risking floods on mudik routes and tourist sites. BMKG outlined anticipation measures, including weather modification to prevent uncontrolled heavy rain, particularly in previously disaster-hit Sumatra. Intensive monitoring supports public safety through early January 2026. The public is advised to check updates on bmkg.go.id or the Info BMKG app.
