West Java rainfall to decline this week: BMKG

Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) predicts a decrease in rainfall across West Java for the week of May 25-31, 2026. While the overall trend shows declining precipitation, localized heavy rain and thunderstorms may still occur, especially early in the week.

Rossian Nursiddiq, a BMKG forecaster, cited warm sea surface temperatures in Indonesian waters as a factor contributing to increased moisture and convective cloud formation. The agency warned that moderate to heavy rainfall, accompanied by lightning and strong winds, could affect several areas on Monday and Tuesday, May 25-26. These include Bogor Regency and City, Depok, Bekasi, Sukabumi, Cianjur, Purwakarta, Subang, Bandung, West Bandung, Sumedang, Cirebon, Indramayu, Majalengka, and Kuningan.

Despite these short-term risks, BMKG has not issued early warnings for meteorological drought or extreme rainfall. The forecast indicates that approximately 80 percent of West Java will experience moderate rainfall, ranging from 50 to 150 millimeters, during the final ten days of May. Only about 1 percent of the province, primarily around Bogor City, is expected to record high rainfall intensity between 150 and 300 millimeters.

Looking ahead, BMKG anticipates low rainfall for 61 percent of West Java in June, particularly in the northern coastal, central, and eastern regions. Moderate rainfall is expected in western and southern areas. By July, 92 percent of the province is forecast to have low rainfall, increasing to 100 percent in August as the dry season intensifies.