Jakarta, Indonesia Sentinel — Indonesia’s Meteorology, Climatology, and Geophysics Agency (BMKG) has issued an early warning for potential tidal flood or rob. The flood expected to affect several coastal regions across the country, including the northern coastline of Jakarta and other areas along Java’s northern seaboard.
In a public advisory released Monday (July 14), BMKG said the warning is driven by two lunar phenomena: the Perigee, when the moon is closest to Earth (occurring on July 20, 2025) and the New Moon phase (on July 24, 2025). These celestial events are likely to raise sea levels and increase the risk of tidal flooding in low-lying coastal areas.
“This potential coastal flooding may disrupt activities in harbor zones and coastal settlements, including cargo loading and unloading operations, residential areas, salt farming, and aquaculture,” the agency said in its official statement.
BMKG has identified several coastal areas likely to be impacted. Here’s the list of impacted coastal area, as reported by CNN Indonesia:
Jakarta (July 18–27, 2025):
- Kamal Muara
- Kapuk Muara
- Pluit
- Ancol
- Kamal
- Marunda
- Cilincing
- Tanjung Priok
- Kalibaru
- Muara Angke, Penjaringan
West Java (July 15–23 and 23–28):
- Subang, Indramayu, Cirebon
- Sukabumi, Garut, Cianjur, Tasikmalaya, Pangandaran
Central Java (July 15–18 and 23–30):
- Semarang, Demak, Pekalongan, Batang, Kendal, Jepara
- Cilacap, Kebumen, Purworejo (July 21–28)
Yogyakarta (July 21–28):
- Kulon Progo, Bantul, Gunungkidul
East Java:
- Surabaya and Tanjung Perak Port (July 22–27)
- East Surabaya (July 23–26)
- Kalianget (July 24–25)
Read Also:
Indonesia to Nominate Pacu Jalur Rowing Tradition for UNESCO Cultural Heritage List
In addition to Java and Jakarta, BMKG also flagged potential tidal flooding in parts of North Sumatra, Riau Islands, West Sumatra, Jambi, Bangka Belitung Islands, Banten, West Nusa Tenggara (NTB), East Nusa Tenggara (NTT), South Kalimantan, Central Kalimantan, West Kalimantan, North Sulawesi, Maluku, and South Papua.
BMKG urged coastal communities to remain alert and take precautionary measures. The public is encouraged to regularly monitor official maritime weather updates via BMKG’s communication channels.
(Raidi/Agung)
