BMKG shows no active Bali land warning as earlier bulletin flags rough southern seas

Bali — Indonesia’s meteorology agency BMKG listed no active severe-weather warning for Bali on its provincial early-warning page on 15 September 2026, while its national maritime bulletin that had classified seas south of the island as rough had already expired before Sunday, 20 September.

The BMKG Bali early-warning page stated that there were no active warnings for the province at the time of the most recent update, noting “Tidak Ada Peringatan Dini Cuaca Bali,” or no early weather warning for Bali, in material dated 15 September 2026.

That page covers land-based hazards such as heavy rain, thunderstorms and strong winds, and does not function as a clearance for marine travel.

Separately, BMKG Jakarta’s “Indonesian Weather Bulletin for Shipping (Metarea XI)” issued at 00.00 UTC on Tuesday, 15 September 2026, described conditions in the Indian Ocean south of Bali as “Southeasterly 10–18 kt, Rough Sea.”

The same bulletin classified the Bali Sea to the north of the island as having easterly winds of 5–16 knots with a “Moderate Sea.”

The bulletin is presented as a forecast product for shipping, but the validity window shown in the online version ends before 20 September 2026 according to BMKG’s timestamp, meaning it cannot be used as a direct forecast for Sunday travel.

Local maritime guidance

Regional guidance from the BMKG office for Bali also highlighted elevated marine risks around the same mid‑September period.

A general forecast bulletin from BMKG’s regional office for Bali advised residents and mariners to “be alert to potential increases in wind speed and sea wave heights that can reach 2 metres or more in the southern part of the Bali Strait, Badung Strait, Lombok Strait and the waters south of Bali.”

Local media reports citing BMKG similarly noted the risk of strong winds and waves of up to around 3.0 metres in waters south of Bali on 16 September, though they did not extend that guidance explicitly to 20 September.

Sanur conditions and land forecast

BMKG’s Sanur land-weather forecast page for Denpasar Selatan showed hourly conditions such as cloudy skies, temperatures around 24 °C and moderate easterly winds, with the forecast marked as updated on 11 September 2026 at 20.00 WITA.

Because this update precedes 20 September, BMKG’s own materials indicate it should be treated as background rather than a current forecast for travel decisions on that Sunday.

BMKG’s separate Sanur Kauh forecast page for the same district carried a later update on 27 May 2026, but likewise did not provide coverage specifically for 20 September.

Implications for travelers

For visitors planning crossings, fishing trips, diving excursions or other activities in exposed waters around Bali, the mid‑September marine bulletins indicate that seas south of the island can reach at least rough conditions with significant wave heights of 2 metres or more in some areas during that period, even when no provincial land-weather warning is active.

However, because the cited bulletins and forecasts do not cover 20 September, travelers are advised to check the latest BMKG updates, local port notices and operator guidance before departure.

Ferry companies, port authorities, hotels and tour providers may adjust or cancel services based on the most recent observations, vessel capabilities and conditions along specific routes, particularly for open-water passages south of Bali.

Conditions can differ substantially between coastal locations such as Sanur, nearby ports and offshore waters; the absence of a land-based early warning on BMKG’s Bali page on 15 September does not guarantee normal marine operations on 20 September.

For up-to-date information, travelers should consult BMKG’s official forecast pages shortly before travel and obtain direct confirmation from their transport or tour operators.

Sources

• BMKG – Peringatan Dini Cuaca Bali
• Balipost – 5 Wilayah Berpotensi Angin Kencang, Cek Prakiraan