JAKARTA - The Meteorology, Climatology and Geophysics Agency (BMKG) reminded fishermen, especially those using sampan, to be aware of the potential for high waves in a number of waters in North Sumatra.
"High waves are potentially occurring from April 20 to 23, 2026 with a height of 1.25 to 2.5 meters," said BMKG Praktirawan at the Belawan Maritime Meteorology Station Rizky Ramadhan in Medan, Saturday.
Wind patterns in the northern part of Indonesia generally move from northwest to northeast with wind speeds of 6-20 knots.
Meanwhile, in the southern part of Indonesia, it generally moves from northeast to southeast with wind speeds of 6-25 knots.
Waves of 1.25 to 2.5 meters are likely to occur in the waters west of the Nias Islands, the waters west of the Batu Islands, the western Indian Ocean Nias Islands, and the northern Malacca Strait.
This condition is at risk for the safety of navigation for fishing boats if the wind speed reaches 15 knots and the wave height reaches 1.25 meters.
Likewise, for the barge if the wind speed reaches 16 knots and the wave height reaches 1.5 meters.
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