High waves expected in several Indonesian waters from June 10-13

High waves, reaching between 2.5 and 4 meters, are forecast to impact several Indonesian waters from June 10 to June 13, 2026, according to the Meteorology, Climatology, and Geophysics Agency (BMKG).

The agency's social media updates indicate that these significant wave heights are likely in the Indian Ocean west of the Nias Islands and the waters south of Banten. Additionally, coastal areas in Bengkulu, Lampung, West Java, Central Java, Yogyakarta, East Java, Bali, West Nusa Tenggara, and East Nusa Tenggara are also expected to experience similar wave conditions until June 13.

BMKG emphasizes that these high waves pose a considerable risk to the safety of maritime navigation. The agency strongly advises residents, fishermen, and sea transportation operators to monitor weather and sea conditions closely before embarking on any sea-bound journeys. Specific warnings are issued for different vessel types: even a moderate wind speed of 15 knots combined with a 1.25-meter wave height can endanger fishing boats. Tugboats face risks with winds at 16 knots and waves around 1.5 meters, while ferry operations are considered at risk if winds reach 21 knots and waves are 2.5 meters high.