What to expect when you get there

This is an undeveloped beach. There are no lifeguards, no concession stands, no organized parking lot — just a narrow shoulder along Farrington Highway. Pit toilets sit a short walk from the sand at the Kaena Point parking area, but bring everything else: water, snacks, sunscreen, shade if you can rig it. There is essentially no shade on the beach itself.

Swimming and surf

The water at Yokohama is genuinely beautiful — clear turquoise on calm summer days. But the conditions here are not casual. The bay sits exposed to north and west swells. From late fall through early spring, surf regularly runs head-high and bigger, and the shore break can be punishing. Currents along this stretch of the Waianae Coast are strong year-round, and there is no lifeguard.

Treat it like a beach for experienced ocean-goers. Summer mornings give the calmest windows for a swim. If the surf is up at all, stay on the sand. The break draws skilled bodyboarders and a few surfers who know the spot — watch them for a while before you decide to enter the water.

Wildlife

Yokohama is one of the most reliable spots on Oahu to see Hawaiian monk seals, an endangered native species. They haul out to rest on the sand fairly often. Stay back at least 50 feet — they're protected by federal law, and well-meaning tourists getting too close has caused real problems. Volunteers from NOAA and the Hawaiian Monk Seal Research Program will sometimes rope off a section of beach when a seal is resting; respect the cordons.

Green sea turtles (honu) also frequent the bay. Humpback whales pass close to shore between November and April; the cliffs above Kaena Point are one of the better land-based whale-watching vantages on Oahu.

The drive out

From Honolulu, plan on roughly an hour each way (H-1 west to Farrington Highway, then up the Waianae Coast through Maili, Waianae, Makaha, and Makua). The west-side drive is scenic but slow — it's a single-lane highway through small communities, and there's no quick alternate route. Gas up before you leave town; the last reliable gas station is in Waianae.

Parking is along the road shoulder near the beach or at the small lot at the very end where the Kaena Point Trail begins. Keep valuables out of sight — break-ins do happen at the trailhead lot. Cell coverage thins out past Makaha.

Combining it with Kaena Point

Most people who drive all the way out to Yokohama do so to also walk the Kaena Point Trail — a 5-mile round-trip dirt path along old jeep tracks to the westernmost tip of Oahu. The trail leads through a federally protected seabird preserve (Laysan albatross nest there from November to July) and ends at a windswept point with sweeping views back along both the Waianae and North Shore coastlines. There's no shade and no water along the way; bring at least a liter per person and start early to beat the midday heat.

If you're not up for the full hike, even an hour at Yokohama itself rewards the drive. It's one of the few places on Oahu where you can stand on a beach with nothing built behind you and almost nobody around — a real glimpse of what the rest of the island looked like a century ago.