Halona Blowhole is a natural oceanic marvel located on the southeastern shore. This geological formation is a result of molten lava tubes from volcanic eruptions thousands of years ago; the ocean waves force water through a narrow opening at the surface, creating a powerful geyser-like spray that can reach heights of up to 30 feet or more, depending on the tide and wave conditions. The spectacle is most impressive during high tide and strong winds, drawing visitors for its dramatic display.
Adjacent to the blowhole is the Halona Beach Cove, a small, secluded beach nestled in the rocks below the lookout. This picturesque cove, with its turquoise waters and fine sand.
The Halona Blowhole Lookout provides panoramic views of the Pacific Ocean, the rugged coastline, and, on clear days, the neighboring island of Molokai. The site combines natural beauty, geological interest, and cultural significance, making it a popular stop for those exploring O‘ahu's scenic attractions.