Indonesia is bracing for another round of extreme weather, with the Meteorology, Climatology, and Geophysics Agency (BMKG) warning that heavy rain and strong winds could trigger floods, landslides, and other hydrometeorological disasters across much of the country in the coming week.
According to BMKG Deputy for Meteorology Guswanto, several large-scale atmospheric patterns are now converging over Indonesia, fueling the surge in rainfall intensity and extreme weather.
“Several key factors influencing the current weather dynamics include Tropical Cyclone FUNG-WONG, the Madden–Julian Oscillation (MJO), and active Kelvin and Equatorial Rossby waves, which are expected to persist across Indonesia until mid-November 2025,” he said in Jakarta on Monday (November 10).
Tropical Cyclone FUNG-WONG, located over the eastern Philippine Sea and moving northwest toward Luzon, is having an indirect impact on Indonesian weather. It’s increasing rain cloud formation and wind speeds—reaching over 25 knots—in parts of North Kalimantan, Sulawesi, Maluku, and northern Papua.
Meanwhile, the interaction between MJO phase 5 (Maritime Continent) and the Rossby and Kelvin waves is further intensifying convective cloud development across western, central, and eastern Indonesia. The result: widespread rainfall and a heightened risk of extreme weather conditions.
BMKG’s Director of Public Meteorology, Andri Ramdhani, forecasts that the risk of severe weather will remain high across many regions from November 10 to 16, 2025. His analysis shows that moderate to heavy rain is likely between November 10 and 12 in most of Sumatra, Kalimantan, Sulawesi, Papua, as well as DKI Jakarta, Yogyakarta, Bali, and Nusa Tenggara.
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Areas under “alert” status for heavy to very heavy rain include Aceh, Bengkulu, Banten, West Java, Central Java, East Java, West Kalimantan, West Sulawesi, North Maluku, West Papua, Central Papua, Papua Highlands, Papua, South Papua, West Sumatra, West Nusa Tenggara, East Kalimantan, South Sulawesi, and East Nusa Tenggara. “For strong wind potential, it’s forecasted to occur in Banten, Bengkulu, Lampung, Nusa Tenggara Barat, and Sumatera Barat,” Andri said.
From November 13 to 16, 2025, the pattern continues. Bengkulu, West Java, Yogyakarta, East Java, West and East Nusa Tenggara, West, Central, and South Kalimantan, South Sulawesi, Central Papua, and the Papua Highlands are all predicted to experience heavy to very heavy rain.
Other regions—such as Aceh, North and West Sumatra, Riau, Riau Islands, Jambi, South Sumatra, Bangka Belitung Islands, Lampung, Banten, Jakarta, Central Java, Bali, Kalimantan, and parts of Sulawesi and Papua—may still see moderate to heavy rainfall.
Strong winds are expected to persist in Central Java, West Kalimantan, Central Sulawesi, South Sulawesi, Central and South Kalimantan, West Nusa Tenggara, Bali, Jakarta, and Banten.
Given these forecasts, Guswanto urged the public to remain vigilant but not panic. He reminded people to watch out for sudden weather changes—especially heavy rain with lightning and strong winds—and to avoid outdoor activities during thunderstorms. Residents were also advised to stay clear of large trees or unstable structures.
BMKG also emphasized the importance of maintaining clean surroundings and ensuring that drainage systems work properly to prevent flooding. The agency warned that the increase in rainfall could disrupt fishing activities and sea transport, urging caution against potential high waves in several seas, including the Indian Ocean (west of Sumatra to south of Java), Banda Sea, Flores Sea, and Arafura Sea.
