Tidal Flood Warning Issued for Coastal Regions from 8-25 June
The Indonesian Agency for Meteorology, Climatology, and Geophysics (BMKG) has informed the public of potential tidal flooding (rob) in several coastal regions of Indonesia. This warning is effective for the period of 8-25 June 2026.
The occurrence of the Super New Moon phenomenon (the perigee and new moon phase) on 15 June 2026 has the potential to increase maximum sea levels. Based on water level monitoring and tidal predictions, coastal flooding is likely to occur in several Indonesian coastal areas, including:
Aceh Coast (11-18 June 2026): Bireun and Lhokseumawe.
North Sumatra Coast (12-18 June 2026): Medan Belawan, Medan Labuhan, and Medan Marelan.
Riau Islands Coast: Batam (13-21 June), Dabo Singkep (14-21 June), Karimun (13-20 June), Tanjung Pinang (11-23 June), Anambas (15-18 June), and Natuna (12-21 June).
West Sumatra Coast (13-17 June 2026): Padang City, Padang Pariaman, Pesisir Selatan, Agam, West Pasaman, and the Mentawai Islands (Pagai, Siberut, and Sipora).
Jambi Coast (14-23 June 20 Whilst Jambi): Tungkal, Mendahara Ilir, East Sabak, Nipah, and Sadu.
Bangka Belitung Islands Coast (14-20 June 2026): Bangka and Belitung.
Banten Coast (12-18 June 2026): North Tangerang (Teluk Naga and Kosambi), North Serang (Kasemen, Pontang, and Tirtayasa), Northern Sunda Strait (Pulomerak and Ciwandan), West Pandeglang (Labuan), South Lebak (Bayah), and South Pandeglang (Cikeusik).
Jakarta Coast (10-19 June 2026): Kamal Muara, Kapuk Muara, Pluit, Ancol, Kamal, Marunda, Cilincing, Tanjung Priok, Muara Angke, Penjaringan, and Kalibaru.
West Java Coast: Subang, Indramayu, and Cirebon (8-12 and 20-24 June); Bekasi and Karawang (10-19 June); Sukabumi, Garut, Cianjur, Tasikmalaya, and Pangandaran (13-20 June).
Central Java Coast: Cilacap (13-20 June); Semarang, Demak, Pekalongan City, Pekalongan Regency, Batang, and Kendal (8-10 and 14-23 June); Jepara (8-12 and 16-24 June); Brebes, Tegal City, Tegal Regency, and Pemalang (8-12 and 16-24 June).
East Java Coast: Tuban, Lamongan, and Gresik (16 June); East Surabaya, Sidoarjo, and Pasuruan (13-17 June); Surabaya Port (12-18 June); Banyuwangi (13-18 June); and Kalianget (15-16 June).
Bali Coast (12-20 June 2026): Southern Bali (Gianyar, Badung, Denpasar, Tabanan, Klungkung, and Jembrana).
West Nusa Tenggara Coast (11-19 June 2026): Lembar and Bima.
East Nusa Tenggara Coast (13-18 June 2026): Sumba, Flores-Alor, Timor-Rote, and Sabu-Raijua.
North Kalimantan Coast (15-19 June 2026): Tarakan.
South Kalimantan Coast: Kotabaru and Tanah Bumbu (14-21 June); Barito Kuala, Banjar, Banjarmasin, and Tanah Laut (15-23 June).
Central Kalimantan Coast: Kumai, Pantai Lunci, Kuala Jelai, and Kuala Pembuang (14-25 June); Sampit and Kapuas (15-23 June).
West Kalimantan Coast (15-20 June 2026): Parts of the Kapuas River banks.
North Sulawesi Coast: Talaud, Sangihe, North Bolaang Mongondow, Bolaang Mongondow, South Minahasa, Tombariri, Mandolang, Manado Tua, and Manado (14-19 June); Sitaro Islands (14-18 June); North Minahasa, Bitung, Kema, Southeast Minahasa, East Bolaang Mongondow, and South Bolaang Mongondow (15-18 June).
West Sulawesi Coast (15-17 June 2026): Polewali Mandar, Majene, Mamuju, Mamuju Tengah, and Pasangkayu.
Maluku Coast: Ambon (11-20 June); Central Maluku (10-21 June); East Seram (12-19 June); and Aru, Kai, and Tanimbar Islands (13-19 June).
Impact of Tidal Flooding:
Tidal flooding generally impacts community activities around ports and coastal areas, including:
Loading and unloading activities at ports;
Activities in coastal settlements;
Salt farming and inland fishery activities.
The public is advised to remain vigilant and prepared for maximum sea tides and to closely monitor maritime weather updates from the BMKG.