Historical water-quality estimates and typical snorkeling conditions
The Big Island's Kona coast has some of the best snorkeling in all of Hawaii. The dry climate, volcanic rock coastline, and clear Pacific water create exceptional visibility and marine life diversity. Manta rays, spinner dolphins, sea turtles, and hundreds of reef fish species are regular sights.
The Kona and Kohala coasts have different rainfall and runoff patterns from windward areas. Geography and historical ratings are planning context; they do not establish today’s water quality. The island notices above name their specific locations and do not automatically apply to every spot listed below.
Even on the normally clean Kona coast, avoid snorkeling for 72 hours after heavy rain. Check for Big Island brown water advisories before entering the water anywhere.
Natural lava entry steps into 20+ feet of visibility. Turtles, spinner dolphins, eels, and hundreds of reef fish. One of the best shore snorkel spots in all of Hawaii. No sand — pure lava entry. Best in calm morning conditions.
Protected cove in Kailua-Kona with a shallow reef perfect for beginners. Green sea turtles are almost guaranteed. Protected from the open ocean, making it calmer than most spots. Best snorkel beach for first-timers on the Big Island.
Crystal clear turquoise water on the Kohala Coast. Snorkel the rocky ends for fish and turtles. Sandy center for swimming. Historical water-quality estimates do not establish current conditions in any season.
Marine sanctuary at the Captain Cook Monument. Possibly the best snorkeling on the entire island but requires a kayak paddle or boat tour. Spinner dolphins and exceptional coral diversity. Visibility often exceeds 50 feet.
Snorkel the rocky southern end of Hapuna for reef fish and occasional turtles. The central sandy beach is better for swimming. The historical rating and typical clarity are planning context, not current water-quality measurements.
Near Kona Airport. Giant Pacific manta rays gather here at night to feed on plankton. One of the most magical wildlife experiences in Hawaii. Requires a guided tour — operators provide all equipment and flotation.
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.
Free grouped email updates when Hawaii DOH issues or cancels advisories for your chosen island.
⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health. Rankings are based on publicly available DOH water quality data and geographic analysis. Always verify conditions before entering the water.
Check Hawaii DOH Clean Water Branch for current advisories.
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. 🤙