As November begins, Bali has started to experience heavy rainfall. The public is urged to remain alert and cautious. On Monday (November 3, 2025), around 6:00 p.m. WITA, heavy rain poured down in Gianyar Regency. Residents who were exercising outdoors quickly dispersed to find shelter.
The Head of the Regional Agency of Meteorology, Climatology, and Geophysics, Cahyo Nugroho, announced at 6:20 p.m. WITA on the same day the potential for coastal flooding (rob) in several areas across Bali.
Cahyo made the announcement through the official BMKG Bali social media account. He explained that the Perigee and Full Moon phases occurring on November 5, 2025, could increase the maximum sea level height.
According to Cahyo, based on water level observations and tidal predictions, coastal flooding (rob) is likely to occur in several coastal regions of Bali. These areas include the southern coasts of Tabanan, Badung, Denpasar City, Gianyar, Klungkung, Karangasem, and Jembrana.
“The potential for coastal flooding varies in timing, both in days and hours, across each region. However, in general, it will affect the activities of communities around ports and coastal areas,” Cahyo explained as reported by Kompas.
Activities Might Be Disrupted
Community activities that may be disrupted include loading and unloading at ports, coastal settlements, salt ponds, and inland fisheries. Residents are urged to stay alert and prepared to anticipate the effects of maximum sea level rise.
Earlier, on Sunday (November 2, 2025), Bali Governor I Wayan Koster held a readiness rally to anticipate incoming waste that often accompanies the rainy season.
“Every year during the heavy rainy season, Bali doesn’t only get dirty because of our own waste but also receives waste carried from other regions. This has become an annual cycle, particularly between December and February,” said Koster.
According to him, ocean currents during the rainy season carry waste materials to southern Bali waters, which then accumulate along the coastline. Through this rally, Koster hopes to take anticipatory measures to address the potential increase in waste volume that routinely occurs each rainy season.
He also requested that the Badung Regency Government prepare facilities and cleaning personnel on standby, especially along the 20-kilometer stretch of coastline that is prone to piles of floating waste.
“With the readiness we are implementing today, once the waste arrives, there’s no need to wait long. We’ll immediately handle it and clean it up so the beaches can quickly return to normal,” Koster said, quoted by AntaraNews.
Potential Coastal Flooding
The Regional Agency of Meteorology, Climatology, and Geophysics in Denpasar again reminded the public to remain cautious of potential coastal flooding or rob that could occur in seven coastal regions of Bali from November 5 to 9, 2025.
“We urge the public to stay alert and prepared to anticipate the impacts,” said Cahyo Nugroho in Denpasar on Monday (3 November 2025).
He explained that the potential for maximum sea level rise is caused by the Full Moon phase and the closest distance between the Moon and Earth (Perigee) on November 5, 2025.
Based on water level monitoring and tidal predictions, rob is expected to occur in Jembrana Regency, southern Tabanan coast, Badung coast, and Denpasar coast, as well as in Gianyar, southern Klungkung, and southern Karangasem coasts.
“The potential for coastal flooding varies in both days and hours across each region. In general, it will affect the activities of communities around ports and coastal areas,” Cahyo added.
Activities likely to be affected, Cahyo continued, include loading and unloading at ports, activities in coastal settlements, salt pond operations, and inland fisheries. Cahyo urged the public to stay updated with the latest information from the Meteorology Agency/BMKG.
“People can check for updates through the website bbmkg3.bmkg.go.id or the maritime weather page maritim.bmkg.go.id. Weather information is also available on social media such as Instagram @bmkgbali or through the Info BMKG mobile application,” he concluded.
Sources: Kompas.com, AntaraNews
Feat Image: Aditya Nara via Unsplash