CILACAP - The Meteorology, Climatology and Geophysics Agency (BMKG) warns of the potential for high waves that can reach 4 meters in the waters south of Central Java (Jateng) on January 8-11, 2026, which is at risk of shipping and maritime activities.
Head of the BMKG Data and Information Dissemination Service Working Team, Tunggul Wulung Cilacap Meteorological Station, Teguh Wardoyo said that the affected areas include the waters south of Cilacap, Kebumen, and Purworejo, as well as the southern Indian Ocean of Central Java.
"The height of the sea waves in the area is estimated to range from 2.5 meters to 4 meters and is in the high category," he said in Cilacap, Antara, Thursday, January 8.
Based on the analysis of synoptic conditions, the weather in the southern waters of Central Java is predicted to be cloudy with the potential for light rain. Winds in the southern waters of Central Java generally blow from the southwest to the northwest with a speed of 2-20 knots.
"BMKG assesses that the condition is risky for shipping safety," he said.
Wind speeds of 15 knots and waves of 1.25 meters are at risk for fishing boats, wind speeds of 16 knots and waves of 1.5 meters are at risk for barges, and wind speeds of 21 knots and waves of 2.5 meters are at risk for ferries.
In addition, he said, tourists visiting the southern coastal area of Central Java are urged not to swim or play in the open sea area and to comply with safety signs that have been installed by tourism managers.
"We also ask coastal communities, fishermen, marine transportation operators, and tourists to increase vigilance and continue to monitor the development of official weather information and early warnings from the BMKG," said Teguh.
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