If you are currently in Bali, manage a beachfront business, operate logistics near the coast, or are planning ocean crossing or water activities in the next four days please read this immediately and share it to keep others safe.
The Meteorology, Climatology, and Geophysical Agency (BMKG – Denpasar) has issued an official early warning for potential tidal flooding (locally known as banjir rob) along Bali’s coastlines.
⚠️ The Timeline
The warning is active right now and is forecast to last from June 12 through June 20, 2026.
🌕 The Cause: A Double Astronomical Event
According to BMKG Denpasar, the coastal risk is exceptionally high right now due to a combination of two powerful events:
- Super New Moon Phase (June 12–20): Maximizes the baseline tidal pull.
- Perigee Phase (Peaking TODAY, June 15, 2026): This is the exact point when the moon is closest to Earth in its orbit, adding major gravitational muscle to the tides and driving up maximum sea levels.
🚨 Expert Captain’s Update: What to Expect Over the Next 4 Days
Drawing from 30 years of living in Bali and sailing these local waters almost every single day for five years, Captain Lawrence (former owner of Bali Yacht Charters) warns that the next four days from 10:00 to 14:00 may bring truly extraordinary dangerous conditions:
- Massive Swells: Expect extreme high tides reaching upwards of 2.4 meters, which is roughly 50 centimeters above normal. On their own, these anomalies cause significant coastal flooding.
- Violent Currents & “Overflows”: Moving that massive, extra volume of water up and down through the narrow island channels creates incredibly powerful currents. When these competing currents collide, they cause dangerous “overflows” and turbulent water walls.
- Rough Island Crossings: If you are taking a boat or ferry between the islands (e.g., to the Gilis, Nusa Penida, or Lombok), expect very uncomfortable and rough crossings, especially between the peak hours of 10:00 AM and 2:00 PM.
- High-Risk Activities: Swimming, surfing, snorkeling, and recreational boating will be extremely dangerous during these peak window hours.
💡 The Captain’s Advice: If you have ocean crossings or water activities planned over the next four days, it is highly recommended to reschedule them to avoid these extraordinary high tides entirely.
📍 Expected Impact Areas
While the exact surge will vary depending on local peak high-tide hours, BMKG has flagged the entire southern perimeter of the island, including:
- Badung Regency: Kuta, Seminyak, Canggu, Jimbaran, Nusa Dua
- Denpasar City: Including Sanur
- Klungkung Regency: Southern coast (directly impacting boat/ferry loading, island transits, and harbor safety)
- Gianyar, Tabanan, & Jembrana Regencies: Southern coastlines
📋 Key Recommendations & Marine Safety
BMKG and local maritime experts warn that these conditions are highly likely to disrupt beachfront businesses, coastal communities, fish farms, and marine transport operations.
- For Waterfront Businesses & Properties: Secure loose equipment, protect infrastructure, and prepare for potential water ingress during peak hours.
- For Travelers & Logistics Managers: Anticipate boat delays or temporary harbor closures. Check directly with your operator and try to shift travel windows away from midday peaks.
- For Beachgoers: Stay completely out of the water during high-risk hours. The shorebreak and undertow will be unpredictably violent.
📲 Stay Updated
Conditions can change rapidly. Stay informed by tracking real-time updates directly from the official sources:
🌐 Web: maritim.bmkg.go.id
📸 Instagram: @bmkgbali
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