February 4, 2026 | 04:07 pm
TEMPO.CO, Jakarta - The Meteorology, Climatology, and Geophysics Agency (BMKG) has issued an early warning for extreme high waves in parts of Indonesian waters from February 4-7, 2026.
BMKG forecaster Wilmar Rajagukguk attributed this to tropical cyclone seed 94W (8.6 degrees North, 137.6 degrees East) observed in the northern part of the Philippine Sea near Papua, tropical cyclone seed 92S (11.0 degrees South, 99.5 degrees East) in the Indian Ocean west of Lampung, and tropical cyclone seed 98P (17.1 degrees South, 131.0 degrees East) in Australia's north. These storms lead to increased wind speed and high waves in the waters around Indonesia.
According to him, the wind patterns in the northern part of Indonesia move northeastward with wind speeds ranging from 6 to 25 knots, while in the south, the wind moves from the southwest to the northwest at 5-25 knots speed.
"The highest wind speeds were observed in the waters of Sermata-Letti Islands, the western Arafuru Sea, and the northern part of the Malacca Strait," he stated in a written release on Wednesday, February 4, 2025.
These conditions resulted in higher waves ranging from 1.25-2.5 meters potentially occurring in the northern part of the Malacca Strait, Indian Ocean west of the Nias Islands and Bengkulu, North Natuna Sea, the southern part of the Karimata Strait, the central part of the Java Sea, the Indian Ocean south of Banten, Central Java, and East Java, the southern part of West Nusa Tenggara, and the Bali Sea.
High waves also likely to occur in the Flores Sea, the south and northern parts of the Makassar Strait, the central part of the Sulawesi Sea, the Banda Sea, the central part of the Arafuru Sea, the Pacific Ocean north of West Papua, the Indian Ocean west of Aceh, Mentawai Islands, and Lampung, the northern part of the Karimata Strait, the western and eastern parts, the Indian Ocean south of West Java, Yogyakarta, Bali and NTT, the Sumbawa Sea, the Bone Bay, the central part of the Makassar Strait, the western and eastern parts of the Sulawesi Sea, the western and eastern parts of the Arafuru Sea, and the Pacific Ocean north of Papua.
Meanwhile, higher waves in the range of 2.5-4.0 meters are likely to occur in the Pacific Ocean north of Maluku, the Pacific Ocean southwest of West Papua, and the Maluku Sea. "The high waves potential in these regions can pose risks to maritime safety," he said.
Therefore, BMKG urges the public to remain vigilant, especially for fishers aboard fishing boats against wind speeds exceeding 15 knots and wave heights over 1.25 meters.
For barges, they should be cautious of wind speeds exceeding 16 knots and wave heights over 1.5 meters, while ferries should avoid wind speeds exceeding 21 knots and high waves of over 2.5 meters.
For large vessels such as cargo ships and cruise ships, they should avoid wind speeds exceeding 27 knots and wave heights over 4.0 meters. "We urge coastal communities to remain cautious," he said.
Read: BMKG Warns of Up to 4-Meter Waves in Eastern Indonesian Waters
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