Location at Kamehameha Avenue, Hilo.
Black sand beach, water is murky and swimming conditions are poor. Hammerhead sharks are common in the bay. A nice place for a picnic and a popular surfing, fishing, kayaking, sailing and canoeing beach. Nice place for watch sunset. Parking, picnic tables, showers, restrooms on the shore. No lifeguard.

The bay is located 20.6 miles south of Kailua-Kona, accessible via State Highway 160.
Honaunau Bay on the Big Island of Hawaii has some of the best underwater sights. Rare fish and sea turtles can be seen with colorful coral reefs. Especially location for swimming, snorkeling, diving and Kayaking. Lifeguards aren’t always on duty. Restrooms, showers and beach shops are located further back along the shore.

Take Highway 19 north from Kona. Turn left just past Mile Marker #87. At the Four Seasons Resort guard house ask for a "public access pass" to the beach. Turn right at the intersection and follow the road to the parking area and Public Access trails to the beach.
Kahuwai Bay the best beach area is located in front of the Kona Village Resort. There's some green sea turtles on shore. Well-guarded secret of the Big Island diving community. But poor swimming conditions due to rough waters and difficult ocean access due to a slippery lava shelf, also no lifeguards. Beach offers nice sunset views and plenty of shade, ideal for picnics and relaxation.

Located in Kailua-Kona where Palani Road turns into Ali'i Drive.
Kamakahonu Beach is small sandy beach overlooks the 'Ahu'ena Heiau in Kailua Bay. Shallow water and usually calm ocean. Canoe, paddle boat and snorkel gear rentals. Great views of coast and sunset.

Kealakekua Bay is located about 30 minutes south of Kailua-Kona. The only access by car is to Napo'opo'o Beach, which is located on the bay's eastern shoreline. From Kailua-Kona, take Hwy 11 south to the Napo'opo'o turn-off (about 18 miles), then turn right and drive 4 miles to the bay. Ka'awaloa Cove, at the bay's northern end, can be accessed only by boat, and a number of dive tours operate in the area.
lakekua Bay settled over a thousand years ago, the surrounding area contains many archeological and historical sites such as religious temples, and was listed in the National Register of Historic Places listings on the island of Hawaii in 1973 as the Kealakekua Bay Historical District. The bay is a marine life conservation district, a popular destination for kayaking, Scuba diving and snorkeling.

From Kona, take Highway 19 north. Between mile markers 91 and 90, make a left turn onto the rugged, semi-paved road. Drive straight ahead for 1.5 miles (2.4 km) to the beach. Four-wheel drive vehicles are recommended, but most regular cars can handle it as well. The parking area is at an unpaved lot a short walk (5 minutes) from the beach. Note: There is a gate, which is open daily from 9 am to 7 pm, but is closed on Wednesdays.
Kekaha Kai State Park on the Big Island's west coast encompasses a handful of secluded bays and sandy beaches. The most beautiful ones are Mahai'ula Beach, Makalawena Beach and Kua Bay (also known as Manini'owali). Coastal trail connects the beaches. Good place for a variety of water activities: Swimming, snorkeling, diving, bodyboarding, surfing, kayaking. Facilities: Picnic tables, Restrooms. No lifeguards.

From Kailua-Kona, take Highway 11 south. At Captain Cook (near Kealakekua Bay), turn right onto State Highway 160 (Napo'opo'o Road) and follow it to the end.
Napo'opo'o Beach Park located at the southern end of Kealakekua Bay. This is where Captain James Cook first set foot on the Big Island of Hawaii on January 17, 1779. The Hiki'au Heiau (ancient Hawaiian temple site) here, a temple dedicated to Lono, the god of agriculture and fertility of the land. Shoreline is rocky, good for snorkeling, scuba diving and kayaking. Facilities: showers, restrooms, picnic tables, pavilion, BBQ grills, parking. No lifeguards.

From Kona, drive north on Highway 19. Before mile marker 70, make a left turn on Puako Road and then turn left at the next road. Park near telephone poll 71. The trail to the left leads to the beach.
Waialea Bay Beach is one of the few beautiful white-sand beaches on the Big Island. Ocean bottom drops off gradually, good for swimming, snorkeling, scuba diving, surfing and kayaking. Facilities: Showers, Restrooms, No lifeguards.