Maui's most dramatic coastline — water quality & visitor guide
📍 North Maui Coast — Narrow road access, living Hawaiian community
Kahakuloa Bay has excellent water quality for a north Maui location. The small village has minimal wastewater impact, the bay receives good ocean circulation, and the remote setting keeps pollution sources low. The DOH does not monitor this area regularly. The main concern is runoff from the steep surrounding valleys during heavy rainfall, which can temporarily cloud the water.
Most visitors come to Kahakuloa for the dramatic scenery — the towering Kahakuloa Head, the lush valley, and the historic village — rather than for swimming. The beach itself is a small black pebble beach that can be rough in winter.
The steep valleys around Kahakuloa funnel significant runoff into the bay after rain. Wait 48–72 hours after heavy rain before swimming. Also note the narrow road becomes more dangerous when wet.
Free Maui water quality alerts for North Shore and West Maui beaches.
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii DOH.
Verify with the Hawaii DOH Clean Water Branch before entering.
When in doubt, don't go out. 🤙