Ask North Sumatra Residents To Beware Of Waves Reaching 2.5 Meters, BMKG: Until November 6

Synoptic conditions of sea waves in a number of waters of North Sumatra from 4 to 6 November 2025. BETWEEN/HO-BMKG

JAKARTA - Maritime Class II Meteorological Station Belawan Medan, North Sumatra (North Sumatra), said that a number of waters in the North Sumatra region have the potential to be hit by high waves that can disrupt shipping.

"This condition has the potential to occur from November 4 to 6, 2025," said Maritime Class II Meteorological Station forecaster Belawan Medan Indah Riandiny Puteri in Medan City, Tuesday, as reported by Antara.

The sea waves as high as 1.25 to 2.5 meters have the potential to occur in the western waters of North Sumatra, the western waters of the Nias Islands, the western waters of the Nias Islands, the waters of the Batu Islands, and the western Indian Ocean of the Nias Islands.

Wind patterns in northern Indonesia generally move from northwest to southwest with wind speeds ranging from four knots, while in southern Indonesia, they generally move from east to south with wind speeds ranging from 4-25 knots.

The highest wind speed was observed in the Makassar Strait.

To stakeholders are reminded to be aware of the potential for high waves. If the wind speed reaches 15 knots and the sea wave height reaches 1.25 meters, he said, it is risky for shipping using fishing boats.

Wind speeds reach 16 knots and high waves reaching 1.5 meters have a risk to the shipping safety of barges, while wind speeds reach 21 knots and high waves reach 2.5 meters, at risk of the ferry shipping safety.