Kaunaoa Beach offers many fun activities including sunbathing, beachcombing, wildlife watching, hiking, fishing, volleyball, swimming, snorkeling, paddle boarding, surfing, kitesurfing, windsurfing, bodyboarding, skimboarding, kayaking, canoeing, jet-skiing, surf-skiing, water-skiing, and boating. The water near the beach is shallow and has a gradual depth, along with a sandy bottom, which makes it ideal for beginner swimmers. The water near Kaunaoa Beach also occasionally offers fun surfing waves, particularly during summers. In addition, snorkelers also enter the clear water near Kaunaoa Beach in order to explore its vibrant biodiversity - the water near the rocky northern and southern ends of the beach are particularly great spots for snorkeling. The water near the southern end of Kaunaoa Beach also has coral fields and you can view many kinds of animals in the water near Kaunaoa Beach including oysters, urchin, shrimp, and many kinds of fish including snapper and parrotfish. Visitors can also view Hawaiian green sea turtles on rare occasions in the water near Kaunaoa Beach, especially during summers – these endangered sea turtles are protected under the Federal Endangered Species Act 1973 and harming them can result in a fine up to $25,000, along with possible imprisonment. Depending on the time of the year, you can also see migrating whales in the water near Kaunaoa Beach. After sunset, the staff at the Mauna Kea Beach Hotel often casts a bright artificial light on the water near the northern part of the beach. This bright light attracts a lot of plankton, which in turn attracts many manta rays which you can watch from a nearby observation point. However, if you are planning to enter the water near Kaunaoa Beach, we recommend being careful as the water here is known to have unpredictable rip currents and rogue waves, particularly during winters. Kaunaoa Beach offers amazing Instagram-worthy views of the Pacific Ocean and the Kohala Coast, especially during winters - you can also get a distant view of the Mauna Kea mountain from this beach. If you are planning to fish in the water near Kaunaoa Beach, we recommend following the local fishing regulations. The beach is also part of the Ala Kahakai National Historic Trail, which is a 175-mile long trail which offers a unique insight into Hawaii's vibrant landscape and natural and cultural history.