What Bali’s 2,5–4-Metre Wave Warning Means for Visitors
BMKG forecasts 2,5–4-metre waves in Bali’s southern waters and the southern Lombok Strait through Nov. 7, with lower waves in three nearby straits.
Editor: Mursyid Sonsang
· 2 min read
Denpasar — BMKG’s marine warning places the highest waves around Bali in the southern waters of the island and the southern Lombok Strait, where waves of 2,5–4 metres are forecast from Nov. 4 through Nov. 7, 2026.
The warning was issued by the Meteorology, Climatology, and Geophysics Agency, known in Indonesia as BMKG. For Bali, it is valid from 08.00 WITA on Nov. 4 to 08.00 WITA on Nov. 7. The agency’s bulletin also identifies moderate waves of 1,25–2,5 metres in the Badung Strait, the southern Bali Strait and the northern Lombok Strait.
Why the Bali wave warning matters to visitors
The forecast gives ferry passengers, boat operators and people visiting Bali’s coast a practical map of where sea conditions are expected to be most demanding. The 2,5–4-metre range applies to the southern waters of Bali and the southern Lombok Strait, while the three other named passages fall into the lower 1,25–2,5-metre range.
BMKG describes surface winds in northern Bali waters as variable, moving from north to south at 4–25 knots. In southern Bali waters, winds are forecast to move from the southeast to the south at 4–20 knots. Those conditions help explain why the southern waters receive the bulletin’s highest wave classification.
For a foreign visitor, the distinction matters because boat and ferry journeys may cross one of the named straits or coastal zones even when the destination itself appears calm. The warning is a marine forecast, not a closure notice; the bulletin identifies sea conditions and their validity period rather than announcing that beaches, ports or attractions are shut.
The warning’s end time is 08.00 WITA on Nov. 7, 2026. Conditions can change after that point as later BMKG bulletins replace the forecast. The current bulletin therefore defines a specific period and set of waters, rather than a general prediction for all of Bali’s coastline.
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