Knob Hill

Knob Hill is a reef dive centered on a near-surface volcanic pinnacle that rises to about 18–20 ft, heavily encrusted with hard corals, sponges, and tube corals. The surrounding lava-formed arches, ridges, and ledges create natural swim-throughs and crevices and support rich biodiversity, with tropical reef fish and inhabitants such as moray eels, octopus, and white-tip reef sharks frequently seen. Depths range from roughly 18 ft at the knob to about 60 ft on the deeper reef slopes. Visibility is generally good, often exceeding 100 ft on clear days, and water temperatures are typically in the mid- to high-70s °F. The site is accessed by boat from Manele Bay using a mooring buoy; strong currents and surge are common, so dives are often done as drift dives with a boat pickup, and the site is recommended for intermediate to advanced divers. Guides check the shallow swim-throughs with lights; there is no shore entry and divers should take care when ascending near the shallow pinnacle to avoid contacting the reef top.