Halona Blowhole

The Halona Blowhole shoots ocean water up to 30 feet through a natural lava tube, creating dramatic sprays when waves hit just right. This roadside attraction sits along Kalanianaole Highway between Hanauma Bay and Sandy Beach, making it an easy stop during your southeastern Oahu drive. The blowhole performs best during high surf conditions, typically November through March and during incoming tides. Summer swells from the south can also trigger impressive displays. You'll hear the water rushing through the underground chamber before seeing the eruption, so listen for that telltale whoosh. Calm days produce only gentle spurts, while winter storm swells create thunderous geysers that roar and spray. Park in the small gravel lot directly off the highway. No admission fees apply, and the site stays open 24 hours, though daylight visits offer better visibility and safety. Morning light from 7-10 AM provides excellent photo conditions with fewer shadows, while afternoon visits can be sweltering with harsh overhead sun. The viewing area requires only a short walk from your car across uneven lava rock. Wear closed-toe shoes with good grip since the sharp volcanic rock becomes slippery when wet. Bring sun protection, water, and a camera with fast shutter speed to freeze the eruptions mid-spray. Stay behind the concrete barriers and never venture onto the rocks near the blowhole opening. Sneaker waves sweep across this area without warning, and the razor-sharp lava rock edges can cause serious cuts. The ocean currents here rank among Oahu's most dangerous. Most visitors spend 15-30 minutes watching this free natural show. Time your visit with incoming tide charts for the most spectacular performance.