Oʻahu's two most celebrated west side beaches compared — water quality, surf, safety, and which one to visit
📍 Waianae Coast, West Oʻahu
Makaha Beach holds a unique place in surfing history. In the 1950s, when surfers first began charging the biggest waves they could find, Makaha was the arena. The Makaha International Surfing Championship — one of the world's first surf contests — was held here for decades. Buffalo Keaulana, a legendary waterman and lifeguard, spent his career at Makaha and helped shape modern beach safety and surf culture.
Today, Makaha remains a respected local break. In winter, powerful northwest swells produce impressive waves that draw experienced surfers. In summer, the beach calms considerably and is one of west Oʻahu's better swimming options, with a long, beautiful sandy beach and a lifeguard on duty.
The crowd here is predominantly local — very few tourists make it this far. Respectful visitors are welcome. This is authentic Oʻahu, not a resort beach experience.
Yokohama Bay sits at the very end of the highway — past Makaha, past Kaʻena Point Road, at the last accessible point on the west coast before the road ends. The official name is Keawaʻula State Recreation Area. There is no development nearby, no resort, no nearby town. It is one of Oʻahu's most remote and pristine beach environments.
The remoteness translates directly to better water quality — bacteria risk 1-2/5, among the lowest on Oʻahu. With no development upstream to generate runoff, the water stays clean even after rain events.
Yokohama Bay has strong rip currents and powerful waves that break along a rocky shoreline. There is no lifeguard. The combination of remote location, strong currents, and no help nearby makes this genuinely hazardous for swimming. It is beautiful to visit and experience — just not to swim at in most conditions.
On exceptionally calm summer days, experienced ocean-goers can find calmer pockets for a dip — but this requires reading conditions carefully and knowing when to stay out. The scenery, the solitude, and the feeling of being at the edge of the island makes the drive worthwhile even without swimming.
The Waianae coast receives dramatically less rainfall than windward Oʻahu — roughly 15–20 inches per year in some areas versus 60–80 inches on the Koʻolau mountains. This dry, sunny climate creates a completely different ecosystem and feel from the windward beaches.
The leeward coast is predominantly Native Hawaiian and Pacific Islander community. The beaches here feel lived-in and local in a way that resort beaches do not. Visitors who come with respect and genuine curiosity find the west side one of the most rewarding parts of Oʻahu to explore.
Getting there: Take the H-1 west to exit 1, then Farrington Highway (Hwy 93) through Nanakuli, Maili, Waianae, and Makaha. The highway ends past Yokohama Bay at Kaʻena Point, where a hiking trail leads to a protected seabird and monk seal habitat.
The Hawaii Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. On the dry leeward coast this is less frequently an issue, but Makaha Valley development does generate some runoff after the occasional heavy rain event. Yokohama Bay is minimally affected due to lack of nearby development.
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings are estimates based on publicly available data and are not real-time measurements and may not reflect current conditions.
Always verify current water quality with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only and should not be the sole basis for any swimming decisions.
When in doubt, don't go out. 🤙