BADUNG, BALINEWS.ID – The rainy season in Bali is expected to begin gradually between October and November 2025.

According to forecasts released by the Bali Climatology Station, a total of 20 Seasonal Zones (ZOM) across the province will experience the onset of the rainy season with the following distribution: 5% (1 ZOM) in September, 45% (9 ZOM) in October, and 50% (10 ZOM) in November 2025.

The first areas predicted to enter the rainy season in September include Sidemen, Bebandem, and Selat sub-districts.

Meanwhile, nine zones are forecasted to see the start of rainfall in October, covering most parts of Jembrana, central to southern Buleleng, western to central Tabanan, northern and central Badung, western Karangasem, central and southern Bangli, as well as Gianyar from north to south.

The remaining ten zones are predicted to experience the onset of the rainy season in November 2025. These areas include western Jembrana, western to southeastern Buleleng, northern and eastern Bangli, all parts of Karangasem, southern Gianyar, southern Klungkung, southern Tabanan, southern Badung, Denpasar City, and Nusa Penida Island.

Rainfall Predicted to be Mostly Normal

In terms of rainfall intensity, most regions in Bali are expected to experience normal precipitation. Around 15 ZOM (75 percent) are predicted to receive rainfall within the normal range, while the remaining 5 ZOM (25 percent) will likely experience above-normal rainfall.

Areas forecasted to receive normal rainfall include all of Jembrana, most of Buleleng, Tabanan, Badung, Gianyar, Bangli, Karangasem, as well as all of Klungkung and Denpasar.

Meanwhile, zones expected to experience above-normal rainfall include northern and eastern Buleleng, central Tabanan, central Badung, southern Bangli, western and northern Karangasem, southern Gianyar, and Nusa Penida Island.

Rainy Season to Peak in January–February 2026

The peak of the rainy season in Bali is projected to occur between January and February 2026. About nine ZOM are expected to reach their peak in January, while the remaining eleven zones will peak in February.

The Meteorology, Climatology, and Geophysics Agency (BMKG) has urged local governments and communities to remain vigilant against potential disasters such as flooding and landslides, particularly in disaster-prone areas. (*)