BMKG Detects the Impact of the 93S Cyclone Seed, the Southern Waters are prone to High Waves

JAKARTA - The Meteorology, Climatology, and Geophysics Agency (BMKG) has issued an early warning of the potential for high waves that are likely to occur in a number of Indonesian waters during the period of 23-26 December 2025. This condition is triggered by the presence of Tropical Cyclone 93S seeds in the Indian Ocean southwest of West Java.

BMKG Maritime Meteorology Director Eko Prasetyo said that the cyclone's seeds had a significant effect on increasing wind speed and wave height in various waters.

"The Tropical Cyclone 93S seed that was monitored at the coordinates of 12.3 degrees south latitude and 102.6 degrees east longitude triggered an increase in wind speed and wave height in a number of Indonesian waters," said Eko Prasetyo, quoted by Antara, Tuesday, December 23.

BMKG noted that the wind pattern in the northern part of Indonesia generally moves from north to northeast with a speed of around 6-30 knots. Meanwhile, in the south, the dominant wind moves from southwest to northwest with a relatively similar speed.

According to Eko, the highest wind speed was observed in the western Indian Ocean of the Mentawai Islands to Lampung, the southern Indian Ocean of Java to East Nusa Tenggara, the Java Sea, the Banda Sea, and the Arafura Sea.

This condition has the potential to cause waves as high as 1.25-2.5 meters in a number of waters, including the North Natuna Sea, the northern Malacca Strait, the western Aceh Indian Ocean, the southern Java waters, the Java Sea, the Banda Sea, and the Pacific Ocean north of Maluku and Papua.

Meanwhile, very high waves with a height of 2.5-4.0 meters are likely to occur in the western Indian Ocean of the Mentawai Islands, the western Indian Ocean of Bengkulu, and the southern Indian Ocean of East Java, Bali, West Nusa Tenggara, and East Nusa Tenggara.

"The potential for this high wave is at risk to the safety of navigation, especially for fishing boats, barges, and crossing boats," he said.

BMKG appeals to coastal communities, fishermen, and marine transportation operators to increase vigilance and adjust activities during the early warning period to avoid the risk of accidents at sea.