BMKG forecasts clear skies, strong winds and cooler uplands in Bali

Bali — Bali’s meteorology office has forecast generally clear to cloudy conditions, cooler temperatures in some highland areas, and increased wind speeds and sea waves, while confirming that no regency or city in the province is under a rain warning in the latest early-warning period.

According to the provincial branch of the Meteorology, Climatology and Geophysics Agency (BMKG), the general forecast for Bali around Wednesday 16 September 2026 is cerah berawan, or mostly clear with some cloud cover, with air temperatures between about 17 and 31 degrees Celsius and humidity between 60 and 90 percent.

A Bali-based daily reported that BMKG’s early-warning bulletin for Wednesday 16 September 2026 at 08:00 WITA through Thursday 17 September 2026 at 08:00 WITA did not list any regencies or cities under watch or alert levels for rain from light to extreme. This means there were no specific hydrometeorological warnings such as for heavy rain, flooding or landslides during that 24-hour period.

However, BMKG highlighted the potential for stronger winds over parts of the island and surrounding waters. A regional news outlet noted that on 16 September 2026, five areas — Badung, Denpasar, Tabanan, Jembrana and Klungkung — were identified as having a potential for strong winds, with easterly to southeasterly winds forecast at 4–40 kilometres per hour. The same report said BMKG warned of higher wave heights, with seas north of Bali expected at 0.5–1.25 metres and seas south of Bali at 0.75–3.0 metres.

BMKG’s general forecast data for Bali during this period indicated clear to cloudy skies and a temperature range starting from around 17 degrees Celsius at higher elevations up to the low 30s in coastal and lowland areas. Local media reporting on BMKG data for mid-September 2026 similarly noted that the coolest conditions were expected in upland locations such as Bedugul, where minimum temperatures around 17 degrees Celsius were forecast.

The absence of rain warnings does not mean conditions are entirely benign for travellers. Elevated wind speeds and higher waves can affect small boats, watersports, and coastal activities, especially along Bali’s southern coastline where BMKG has signalled wave heights of up to around three metres. Visitors planning sea crossings, diving or surfing are advised to monitor the latest BMKG maritime forecasts and local harbour advisories.

For inland travel, the combination of clear to cloudy skies and cooler night-time temperatures in central highlands may appeal to visitors seeking outdoor activities such as hiking or lake visits, but those heading to areas like Bedugul or Kintamani should be prepared for distinctly cooler conditions compared with the island’s main beach resorts.

BMKG’s early-warning approach focuses on identifying significant hazards such as strong winds, high waves and heavy rain. While Bali remained free of rain alerts in this 16–17 September 2026 window, the agency’s advisories underscore that wind and wave conditions should be taken into account when planning beach and sea-based itineraries.

Sources

• BMKG Regional III – Prakiraan Cuaca Umum Bali
• Bali Post – 5 Wilayah Berpotensi Angin Kencang, Cek Prakiraan Cuaca Bali pada 16 September 2026
• Tribun Bali – Prakiraan Cuaca Bali Hari Ini 16 September 2026, Gelombang Laut Perairan Utara 0.5 - 1.25 Meter