BMKG Warning: Stay alert for waves reaching up to 4 meters in height along the southern coast of Yogyakarta.

For tourists planning a trip to the Southern Coast area of the Special Region of Yogyakarta (DIY), sea conditions must be one of the key considerations before departure.

The Yogyakarta Meteorological Station of Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) has issued a warning regarding potential high waves in the southern waters of Yogyakarta for the period 28-30 September 2026.

This condition requires tourists to exercise extra caution, especially anyone intending to swim, play in the water, fish, or carry out any other activities close to the shoreline.

"Tourists are advised not to swim or conduct activities too near the shore edge, and to fully comply with all instructions from local on-duty officers," stated Head of Yogyakarta Meteorological Station Feriomex Hutagalung in an official announcement released in Yogyakarta on Sunday.

Waves May Reach Up To 4 Meters

According to BMKG forecasts, sea waves along Yogyakarta's southern coast may measure between 2.5 and 4 meters on 28 September 2026. This height falls under the official high wave category.

Sea conditions are expected to moderate slightly in the following days. On 29 and 30 September, wave heights will range from 1.25 to 2.5 meters, classified as medium category waves.

For Travelers, this improvement still requires close attention: even medium category waves do not automatically mean all coastal tourist activities can be performed safely.

Tourists visiting southern Yogyakarta beach destinations are also warned not to rely only on How the sea appears from land. Waves can arrive with sudden, unpredictable changes in strength and pattern, therefore monitoring official weather updates and following on-site officer instructions is a critical safety step.

Verify Weather Conditions Before Travelling

BMKG also urges the public to regularly update weather information, particularly prior to travelling to any coastal area.

"BMKG calls on the public to check for periodic weather updates. Anyone requiring the latest, location-specific detailed forecasts may access BMKG official public channels," he added.

This information is critical for tourists with planned trips to any of the beach destinations along Yogyakarta's southern coast. Aside from helping plan suitable visit times, weather forecasts also allow travellers to adjust their planned activities once at the location.

Atmospheric Dynamics Drive Local Weather Conditions

The Yogyakarta Meteorological Station also monitors atmospheric patterns and sea surface temperatures across Java island and surrounding maritime areas.

Analysis results indicate sea surface temperatures in the Java Sea and the Indian Ocean south of Java currently range between 26 and 29 degrees Celsius.

"As a result, available atmospheric water vapour over this region is below normal levels," the official explained.

Meanwhile, the ENSO index measured at the NINO 3.4 zone was recorded at 2.53 degrees Celsius, classifying as a very strong El Niño event. This phenomenon is confirmed to suppress rainfall potential across the area.

Additionally, equatorial Rossby atmospheric waves have been detected active over the Java island region.

All these atmospheric factors are part of the analysis BMKG uses to assess weather developments across Yogyakarta and surrounding provinces.

Regional Tropical Cyclone Activity Detected

BMKG is also monitoring broader atmospheric system activity across the Southeast Asia region.

"Tropical Cyclone Surigae has been identified over the Philippine Sea east of the Philippines, while developing tropical cyclone disturbance 92W is located off the Thailand coast. This system is causing easterly wind patterns to dominate across the entire Java island, including Yogyakarta Special Region," the announcement stated.

While these technical atmospheric details may sound abstract to travellers, their real-world impacts directly affect coastal Travel Safety.

For this reason, before departing for Yogyakarta's southern coast during 28-30 September 2026, tourists are strongly recommended to check the latest weather updates, observe local conditions on arrival, and strictly follow all officer guidance.

When high sea conditions are present, enjoying the coastal panorama from designated safe viewing areas remains a good option. Not every beach visit requires swimming or water activities, especially when ocean conditions are unsafe.