In the latest of ongoing monsoon-driven alerts, Indonesia's BMKG forecasts light to heavy rain, with lightning and strong winds, across most regions on Saturday, January 24, 2026. Wind convergence and a strengthened Asian monsoon, including a cold surge, are fueling the risks, prompting authorities to urge disaster preparedness.
BMKG's early warning highlights elongated convergence areas in the Arafura Sea, north of Halmahera, and off Papua, enhancing rain cloud formation.
Moderate to very heavy rain with thunder and gusts is expected in Jakarta, Serang, Denpasar, Jayapura, and Merauke. Light to moderate rain will affect Tanjung Pinang, Palembang, Bandung, Semarang, Yogyakarta, Tanjung Selor, Mataram, Kupang, Mamuju, Makassar, Kendari, Manokwari, Nabire, and Jayawijaya. Cloudy conditions prevail in Banda Aceh, Medan, Pekanbaru, Jambi, Bengkulu, Bandar Lampung, Pangkal Pinang, Surabaya, Pontianak, Palangkaraya, Banjarmasin, Samarinda, Palu, Gorontalo, Manado, Ternate, Ambon, and Sorong.
Jabodetabek faces moderate to heavy rain through the week, per forecaster Jatmiko, due to the intensified monsoon. Recent peaks include 267 mm/day on January 18 and 189 mm on January 23. Extreme risks extend to southern Sumatra, Java, Bali, and Nusa Tenggara.
On January 23, the government activated disaster posts, with Coordinating Minister Pratikno stressing BMKG warnings as key references for regions.
