Moderate to High Waves Warning for Yogyakarta Waters Over Next Three Days

The Meteorology, Climatology and Geophysics Agency (BMKG) Yogyakarta Meteorological Station has published information on sea wave heights in the waters of the Special Region of Yogyakarta (DIY). It states that from 17 August to 19 August 2026 there is potential for moderate to high waves.

Sea wave heights in the southern waters of DIY are forecast to increase and enter the high category in the middle of the week, namely Monday (17/8), Tuesday (18/8) and Wednesday (19/8).

The following is the daily estimated sea wave height for DIY waters during the warning period:

• 17 August 2026: Wave heights ranging from 1.25 to 2.5 metres (moderate category).

• 18 August 2026: Wave heights ranging from 2.5 to 4.0 metres (high category).

• 19 August 2026: Wave heights ranging from 2.5 to 4.0 metres (high category).

“Wave heights can change at any time,” wrote BMKG Yogyakarta Meteorological Station in its information.

To prevent accidents in the maritime areas and along the southern coast of DIY, BMKG has included several important advisories for maritime service users and tourists.

For shipping activities, BMKG urges fishermen, barge or ferry operators, and small vessel operators to increase vigilance and to avoid sailing unless absolutely necessary.

Meanwhile, members of the public and tourists are asked to avoid swimming, fishing or water sports that could endanger safety in the southern waters of DIY.

“Always comply with the instructions of the local authorised officers,” wrote BMKG.