If you’re staying anywhere along Bali’s coast over the next week or so, this one’s worth a quick read. Indonesia’s Meteorology, Climatology, and Geophysics Agency (BMKG) has issued an early warning for unusually high tides from 17 to 25 April 2026, with the potential for coastal flooding (locally known as rob) in several areas around the island.

Here’s what’s going on and what to watch out for.

Why the sea is rising higher than usual

Two things are lining up at once:

  • New moon on 17 April 2026 — which already nudges tides higher than normal.
  • Perigee on 19 April 2026 — when the moon is closest to Earth, giving its gravitational pull extra muscle.

Put those together and you get what’s sometimes called a “king tide.” Sea levels along the Bali coast are expected to climb noticeably higher than a typical high tide, and in low-lying spots that water can spill over into streets, settlements, and ports.

Which areas are affected

Based on BMKG’s water level monitoring and tidal predictions, coastal flooding is possible in:

  • Southern coast of Jembrana Regency
  • Southern coast of Tabanan Regency
  • Coast of Badung Regency (think Kuta, Seminyak, Canggu, Nusa Dua, Jimbaran)
  • Coast of Denpasar City (including Sanur)
  • Coast of Gianyar Regency
  • Southern coast of Klungkung Regency

Timing varies from day to day and area to area — it’s not all happening at once. The flooding tends to hit hardest around peak high tide, so if you’re near the beach, that’s the window to be aware of.

Who should pay attention

Coastal flooding during king tides typically affects:

  • Ports and loading/unloading activity — ferry schedules to Nusa Penida, Lembongan, or Lombok can be disrupted.
  • Coastal settlements and businesses — beachfront villas, warungs, and walkways can see water pushing further inland than usual.
  • Salt farmers and inland fisheries — traditional salt pans and fish ponds can get inundated.

If you’re a tourist, it’s mostly a matter of not being caught off guard at the beach during peak tide. If you’re a resident or running a coastal business, it’s worth moving anything valuable away from ground level as a precaution.

Stay updated

BMKG Regional III (Bali) pushes real-time updates through several channels. Easiest options:

You can see BMKG’s official warning video here: Instagram reel from @bmkgbali

Emergency contacts (save these)

If you run into an emergency — flooding damage, someone in trouble, or you need immediate help — call the relevant BPBD (Regional Disaster Management Agency) or BASARNAS (Search and Rescue).

Bali Province — island-wide

  • BPBD Bali Province: 0361-251177 / 085792440799
  • BASARNAS (Search and Rescue): 0361-7033000 / 705536 / 081138115115
  • PMI Bali (Indonesian Red Cross): 0361-9583035 / 081339474681
  • BBMKG Badung (weather info): 0361-751122

By regency / city

  • Denpasar City BPBD: 0361-223333 / 08133634952
  • Badung BPBD: 08113894000
  • Gianyar BPBD: 0361-8958447 / 0361-4795632 / 08113884353
  • Klungkung BPBD: 0366-21047 / 0366-23000
  • Tabanan BPBD: 0361-811171 / 083848568111
  • Jembrana BPBD: 0365-41166 / 082146559989
  • Bangli BPBD: 0366-91448
  • Karangasem BPBD: 0363-22173 / 081138205087
  • Buleleng BPBD: 0362-23022 / 08113892247

Bottom line

This isn’t a tsunami warning or anything dramatic — it’s a predictable tidal event. But “predictable” doesn’t mean “harmless,” especially if you’re staying in a beachfront villa, planning a boat trip to the Nusa islands, or have anything valuable sitting close to sea level. Keep an eye on BMKG’s updates, plan around peak high tide if you’re near the water, and you’ll be fine.

Stay safe out there.

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