Bali sea travel advisory: what a 2.0-metre wave warning means

Travellers heading to Bali by sea should check the official marine forecast before departure because BMKG’s forecast for the southern Bali waters, valid from 17 October 2026 at 00.00 to 20 October 2026 at 00.00, identifies moderate waves and a potential wave height of 2.0 metres. Conditions can affect small-boat and coastal travel.

What is the current sea-risk warning for southern Bali?

BMKG lists the southern Bali waters as having moderate wave conditions, with a potential wave height of 2.0 metres, according to BMKG, 2026. Its forecast records winds from the southeast at 12 knots, gusting to 17 knots, on 17 October 2026 at 12.00, according to BMKG, 2026.

The forecast period runs from 17 October 2026 at 00.00 until 20 October 2026 at 00.00, according to BMKG, 2026. The agency advises people to exercise caution and follow directions from local authorities, according to BMKG, 2026.

Does the forecast mean Bali is closed?

No closure is stated in the BMKG marine forecast. The page describes the sea state and issues a caution for moderate waves; decisions affecting particular services or routes remain subject to the relevant local authorities.

What weather conditions should visitors expect offshore?

For 17 October 2026 at 12.00, BMKG forecasts thick cloud, a temperature of 28°C and relative humidity of 76%, according to BMKG, 2026. The forecast gives a southwest current of 2.03 knots, according to BMKG, 2026.

These figures apply to the southern Bali waters covered by the forecast, not automatically to every beach, harbour or inland destination on the island. Travellers should therefore distinguish marine conditions from land weather information issued for specific areas.

Where should travellers check before going to sea?

BMKG publishes the marine forecast for the southern Bali waters and provides the validity period, wind, current and wave information on the forecast page, according to BMKG, 2026. The agency’s warning is to follow local-authority directions when moderate waves are present, according to BMKG, 2026.

Indonesia’s immigration authorities separately state that travellers using the official e-Visa system must submit an arrival card within 3 days before arrival in Indonesia, according to the Directorate General of Immigration, 2026. That immigration requirement is separate from marine-weather conditions and does not replace checking the sea forecast.

Sources

• BMKG
• Directorate General