Water quality, conditions, and what to know before you go
Moderate visibility. The Ala Wai Canal outfall reduces clarity after rain. Best visibility during dry season (May-September) and during calm conditions. Expect 15-30 feet visibility on good days.
The reef along the Waikiki wall is accessible but heavily used. Coral coverage is moderate. You will see reef fish, sea turtles, and occasional eels. The offshore reef break area has better coral.
Snorkelers face bacteria exposure through any open cuts, scrapes, or wounds. The Ala Wai Canal can discharge high bacteria levels after rain. Avoid snorkeling for 72 hours after heavy rainfall. Cover any open wounds with waterproof bandages.
Early morning (before 9am) offers the calmest conditions and best visibility. Avoid days following heavy rain. Dry season months (May-September) provide the most consistent clarity.
The Hawaii Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. This applies to all ocean activities including snorkeling. Runoff carries bacteria from land into nearshore waters.
When conditions are clear, Waikiki Beach has great options for snorkeling. Check the water quality above, then book with confidence.
Tours listed via Viator and GetYourGuide. Safe to Swim Hawaii may earn a commission if you book, at no extra cost to you.
Free alerts when water quality changes at your beach — brown water advisories, bacteria warnings, and all-clear notices.
No spam. Just safety alerts for your trip.
500+ beaches and 25+ hotels across all 6 islands
Safe to Swim Hawaii provides water quality information based on publicly available DOH data and seasonal patterns. This is not medical or safety advice. Always check current conditions, obey posted signs, and use your own judgment before entering the ocean. Privacy Policy
⚠️ 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.
When in doubt, don't go out. 🤙