Kailua Beach County Park, which fills the colossal main curve of La'aloa Bay, is utterly gorgeous – it’s the prettiest beach on the whole island – and makes an ideal family swimming spot year-round. The soft wide sands slope down into turquoise waters much used by windsurfers and kitesurfers.
Avoiding the crowds is not at all the point at Sandy Beach, half a mile south of Kailua Beach, where the shoreline flattens out between Koko Crater and Makapu‘u Head. Kids from all over Oahu meet up here most weekends for the best body-surfing and boogie-boarding in Hawaii; Barack Obama famously remains a devotee. This is also one of the few places on the island where the waves remain high enough in summer to tempt pro surfers.
The Big Island (Hawai'i)
With its gentle turquoise waters, swaying palm groves, and above all its broad expanse of pristine white sand, Hāpuna Beach, just north of Waialea and a total of six miles north of Mauna Lani, has often been called the most beautiful beach in the United States.
Punalu‘u beach is the largest black sand beach on the Big Island. Black sand is a finite resource, as it’s only created by molten lava exploding on contact with the sea, and at any one spot that happens very rarely. Even those beaches not destroyed by new lava usually erode away within a few years. Each time the coastline of Punalu‘u Bay gets redrawn, however, its black sand washes in again, piling up to create a new beach. At the moment it’s gorgeous, a crescent of jet-black crystals surrounding a turquoise bay and framed by a fine stand of coconut palms.
Green Sand Beach
Green sand beach, a couple of miles northeast of Ka Lae, doesn’t quite live up to its name. It is a beach, and it is greenish in a rusty-olive sort of way, but if you’re expecting a dazzling stretch of green sand backed by a coconut grove you’ll be disappointed. The only reason to venture here is if you feel like a hot, shadeless, four-mile hike along the oceanfront, with a mild natural curiosity at the end. Without great expectations, and on a rain-free day, it’s worth the effort.
Maui’s most spectacular sweep of golden sand stretches for over half a mile south of the landmark cinder cone of Pu‘u ‘Ōla‘i, just south of Mākena. There’s not a building in sight at Oneloa Beach (literally “long sand,” and widely known as Big Beach), just perfect sands and mighty surf, backed by a dry forest of kiawe and cacti.
Kanahā Beach County Park
Kanahā Beach County Park shallow, choppy turquoise waters are ideal for novice windsurfers, who come from all over the world to swirl back and forth against the backdrop of ‘Īao Valley and the West Maui mountains.
Lanai’s northern shoreline, however, is more commonly known as Shipwreck Beach, because countless vessels have come to grief in these shallow, treacherous waters; the coast is littered with fragments, while two large wrecks remain stuck fast a few hundred yards offshore.