Halona Blow Hole, or just Blow Hole to the locals, is located on the Makapuu Coast right before you get to Sandy Beach. It’s basically a hole in a rock chamber that spouts ocean spray when large waves crash into it. There are several blow holes around Hawaii but the one in Makapuu is the most well-known and most-visited.
There is some tragedy associated with this blow hole. Over the years, several people have been injured and even killed when they got too close to the hole at the wrong time. The air pressure generated by powerful waves crashing into the rock chamber causes air to blast out with hurricane force and can toss a person into the air. So, like many of nature’s spectacles, it pays to be careful and respectful of Mother Nature’s power. If you stay in public viewing areas, you’ll be perfectly safe.