Komodo diving: how currents, waves and park rules shape dive safety

Komodo diving is shaped by strong tidal currents, shallow straits, reefs and islets, so site choice and timing matter as much as visibility. Official park guidance identifies some sites as current-prone or suitable only for experienced divers, while BMKG forecasts provide the sea-state and current information needed before departure.

Why are Komodo’s currents unusually important?

The straits between Rinca and Flores and between Padar and Rinca are relatively shallow, at 30–70 metres, and have strong tidal currents, according to the Komodo National Park authority. It says the combination of currents, coral reefs and islets makes navigation around the park difficult and dangerous.

Which dive sites require extra experience?

The park’s dive-site guidance says some locations can experience strong currents and down-currents, and recommends diving during slack tide at one such site. Another site is described as current-prone, while a separate site is not recommended for inexperienced divers because of potentially strong currents around its pinnacles.

The same guidance describes drift diving as the usual approach at a site where current is normally present, and advises beginner divers to remain along the wall when currents make swimming to pinnacles unsuitable.

What should divers check before going to sea?

BMKG’s marine forecast for Komodo National Park reports wind, gusts, wave height and current direction and speed. In one forecast period published in September 2026, it listed easterly wind at 12 knots, gusts of 19 knots, waves of 1.7 metres and a southwestward current of 1.6 knots, classifying the waves as moderate, according to BMKG, 2026.

BMKG classifies waves of 1.25–2.5 metres as moderate, 2.5–4 metres as high, 4–6 metres as very high and more than 6 metres as extreme, according to its marine warning guidance, 2026.

How do park rules protect reefs and divers?

The park’s zoning guidance prohibits anchoring except in designated areas and prohibits damaging marine habitat. It also limits free passage of ships to the Pelagic and Traditional Use zones; vessels seeking to enter the Wilderness Zone need special licences.

The park’s environmental assessment guidance calls for designated marine access areas, navigable channels and anchorages, maximum vessel speeds in nominated zones, pre-use safety checks and personal flotation devices. It also says professional and tourist diving should follow strict standard operating procedures.

What are the reef conditions like?

The park authority reports that water temperature ranges from 25–29°C in the north, 24–28°C in the middle and 22–28°C in the south. It describes the water as generally clear, though waters closer to the islands are relatively more turbid, with salinity of about 34 parts per thousand.

Sources

• Komodo National Park Authority
• BMKG