Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) forecaster Henokhvita announced via a Jakarta broadcast that rain of varying intensities will dominate most regions on Sunday, January 18, 2026. Thunderstorms are possible in several areas; check bmkg.go.id or the Info BMKG app for updates.
Regional forecasts include:
Sumatra: Light rain possible in Medan, Padang, Bengkulu, and Pangkalpinang; cloudy to overcast in Banda Aceh, Pekanbaru, Jambi, and Tanjung Pinang. Alert for rain with thunder in Palembang and Bandar Lampung.
Java: Rain with thunder in Jakarta and Surabaya; moderate rain in Serang and Yogyakarta; light rain in Bandung and Semarang.
Kalimantan: Light rain in Tanjung Selor, Samarinda, and Palangkaraya; overcast in Pontianak; rain with thunder possible in Banjarmasin.
Bali and Nusa Tenggara: Rain with thunder in Denpasar and Kupang; light rain in Mataram.
Sulawesi: Partly cloudy to overcast in Gorontalo, Manado, and Palu; light rain in Makassar, Mamuju, and Kendari.
Maluku and Papua: Partly cloudy to overcast in Ternate, Ambon, and Sorong; light rain in Manokwari, Nabire, Jayapura, Jayawijaya, and Merauke.
BMKG urges vigilance for extreme weather.
