Ulong Channel
Protected Area
Ngerumekaol Spawning Area
Why dive here
With 182+ marine species recorded in the area - including barracuda, lionfish, mandarin fish, napoleon wrasse and nautiluses - Ulong Channel offers some of Rock Islands's richest drift diving. Water ranges 29-30°C, warmest June, October, November.
Ulong Channel isn't just a drift dive, it's a high-speed joyride through a natural aquarium. We love dropping in north of the channel, typically around 20 meters, and letting the current do all the work. It pulls you along a sandy bottom that rarely dips below 13 meters, past schools of spotted surgeonfish so thick they dim the light. Keep an eye out for batavian parrotfish chewing on coral and cleaner mimics darting around. The real magic happens on the channel walls. They’re absolutely packed with life, a constant parade of bicolour parrotfish, foxface, and tiny Queensland eviota. We've spent entire dives just hovering, watching the drama unfold. Look for the occasional cowry or sea olive tucked into a crevice. This is a dive that suits anyone who enjoys a thrilling drift and a relentless display of reef fish in a stunning, shallow setting. You’ll want to do it more than once; there’s just too much to take in on a single pass.
Typical Ulong Channel Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Drift dive - carry a surface marker buoy (SMB) and stay with your group. Brief the current direction before entry.
Nearest Dive Centres to Ulong Channel
Dive shops near Ulong Channel
Splash Dive Center
Cruise Control palau
Cruise Control palau
Sam's Tours
DayDream Dive Center
Neco Marine
Reviews for Ulong Channel
Conditions
Ocean conditions, forecast and tides for Ulong Channel
Ulong Channel Ocean Conditions
Monthly averages for Ulong Channel, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (7.2, 134.3) (4km away)
October Averages
Sea Temperature
30°C
86°F · Range: 28.5–31.2°C
Current Speed
10.05 cm/s
Direction: N (5.7°)
Chlorophyll-a
0.026 mg/m³
Very clear (oligotrophic)
Salinity
33.62 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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