Central Java Weather Forecast for 11 June: Decreasing Tidal Floods, Partly Cloudy All Day

Sunny weather throughout the day in Central Java on Thursday (11/6) will feature a striking difference between daytime and nighttime temperatures. While tidal flooding (rob) is decreasing, high waves in northern and southern waters persist and should be monitored closely.

From morning until early night, the weather across 35 regions in Central Java—including mountainous, highland, and lowland areas—will be sunny and partly cloudy. Winds will blow from the east to the south at speeds of 3-27 kilometres per hour, with temperatures ranging from 18-34 degrees Celsius and humidity between 50-95 per cent.

Tidal flooding in the northern waters of Central Java has dropped drastically to 0.8 per cent, although flooding in coastal areas still occurs. High waves in southern waters, ranging from 1.25 to 2.5 metres, remain risky for maritime activities such as fishing boats, barges, and passenger or cargo transport when wind speeds exceed 15 knots.

“Central Java is entering the dry season; rainfall has significantly decreased, and weather will be sunny and partly cloudy all day,” said Arif Nasution, a forecaster from the BMKG Semarang Meteorological Station, on Thursday (11/6).

As the dry season begins, Arif noted that significant temperature differences will occur between day and night, characterised by heat and humidity during the day and extreme cold at night, affecting not only mountainous and highland areas but lowlands as well.

Retna Swasti Karini, a forecaster from the BMKG Tanjung Emas Maritime Station in Semarang, stated that tidal flooding in northern waters has decreased compared to previous periods, but coastal flooding in several areas of the North Coast (Pantura) of Central Java continues, with heights of 0.8 metres recorded between 13:00 and 18:00 WIB.

Regarding wave heights, Retna Swasti Karini continued that waves in northern waters of 0.5-1.25 metres are relatively safe for maritime activities. However, in the southern waters of Central Java, such as Cilacap, Kebumen, and Purworejo, wave heights of 1.25-2.5 metres pose a significant risk to shipping activities.

“Be alert to wave heights in southern waters, especially when wind speeds exceed 15 knots,” she advised.