Also known as Mauna Kea Beach — a protected crescent bay with exceptional water clarity and world-class snorkeling on the leeward Kohala Coast.
Kaunoa is the Hawaiian name for what most visitors call Mauna Kea Beach — the crescent of white sand fronting the Mauna Kea Beach Hotel on the Big Island's dry, sun-drenched Kohala Coast. It is consistently ranked among the finest beaches in Hawaii and the United States.
The bay's crescent shape provides natural protection from the prevailing northeast trade swell, creating a calm, protected swimming and snorkeling environment for much of the year. The sandy bottom slopes gently, making it accessible for swimmers of moderate ability.
The rocky points at both ends of the bay are alive with coral, reef fish, green sea turtles (hōnu), and occasional spinner dolphins. Snorkel along the left (north) point for the densest coral formations. Bring your own gear or rent at the hotel's beach shack (fee may apply for non-guests).
Hawaii law guarantees public beach access. The Mauna Kea Beach Hotel provides a small public parking lot. Spaces are first-come, first-served and fill quickly by mid-morning. Arrive before 9 a.m. on weekends. You may be asked to check in at the hotel entrance — this is standard procedure, not a barrier to access.
Kaunoa Beach has one of the best water quality records on the Big Island. No streams drain near the beach, and the Kohala Coast receives very little rain. Hawaii DOH advisories for this beach are rare, but always verify before swimming.
From Kona Airport (KOA), drive north on Highway 19 approximately 33 miles to mile marker 68. Turn left at the sign for Mauna Kea Beach Hotel. Follow signs to public beach parking — it's a short walk to the beach from the lot.
Top-rated experiences near this beach. Check water quality above, then plan your trip.
Tours listed via Viator and GetYourGuide. Safe to Swim Hawaii may earn a commission if you book, at no extra cost to you.
Get notified when Hawaii DOH issues advisories for Kohala Coast beaches.
Free alerts when advisories change at your beach.
⚠️ 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 testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions.
Always verify current water quality conditions with the Hawaii DOH Clean Water Branch before entering the water.
This site does not recommend or advise anyone to swim at any beach. We share government data and geographic analysis so you can make your own informed decisions. By using this site you accept full responsibility for your own safety. See our Terms of Use for full details.
When in doubt, don't go out. 🤙