"Kilo nalu" is Hawaiian for "ocean observer". The Kilo Nalu Nearshore Reef Observatory provides a window into the nearshore coral reef physical, biological, and chemical environment on the south shore of Oʻahu. Located just offshore of downtown Honolulu, this cabled observatory operates a suite of observational instruments that resolve waves, tides, currents, and water quality. The data provided help researchers establish baseline conditions and allow for early detection of changes in the water quality of this popular nearshore area.