Impact Of Supermoon, BMKG Asks NTB Residents To Beware Of Rob Floods Until November 12

JAKARTA - The supermoon phenomenon that occurs when the moon is in the closest position to the earth affects sea level and has the potential to cause tidal flooding in coastal areas in West Nusa Tenggara (NTB).

Head of the NTB BMKG Meteorological Station, Satria Topan Primadi, said that tidal flooding has the potential to occur on November 3-12, 2025.

"Install the maximum in Lembar (West Lombok Regency) more than 1.7 meters. The tide time is 21.00 to 02.00 WITA," he said in Mataram, Monday, which was confiscated by Antara.

Meanwhile, the maximum tide in Sape (Bima Regency) is also more than 1.7 meters with the tide time taking place from 21.00 to 05.00 WITA.

Coastal areas that have the potential to be affected by tidal flooding include Ampenan, Sekarbela, Lembar, Labuhan Lombok, Labuhan Badas, and Asakota Bima. The tidal flood can cause inundation in port areas, low coastal areas, as well as settlements adjacent to the coastline.

West Nusa Tenggara is an archipelago province consisting of two large islands in the form of Lombok and Sumbawa, as well as 401 small islands. A total of 292 villages or about 25 percent of the total 1,166 villages/kelurahan are directly adjacent to the sea.

The supermoon phenomenon occurs when the moon is at its closest point to the earth which coincides with the full moon phase. This condition makes the moon look bigger and brighter than the usual full moon.

The full moon phase occurs on November 7, 2025 at 17.55 WIB or 18.55 West Nusa Tenggara time. The closest position of the moon to the earth occurred on November 8, 2025 at 19.35 WIB with a distance of 359,819 kilometers from Earth.

In addition to the gravity factor of the moon, the weather factor also strengthens the potential for tidal flooding. BMKG reports that NTB has now entered the rainy season, so that high rainfall has the potential to worsen puddles in coastal areas and low areas.

The dynamics of the atmosphere due to the activities of Tropical Cyclone Kalmaegi in the northern Pacific Ocean of Papua and the cyclonic circulation in eastern Vietnam affect the convergence of air around the NTB region. The sea surface temperature in the southern waters which ranges from 28'31 degrees Celsius also increases the growth of rain clouds.

BMKG urges coastal communities to always be vigilant by securing important items, not doing activities too close to the coastline during high tides, and paying attention to the tidal schedule.