Water quality status and bacteria risk rating
📍 Hana, East Maui — Road to Hana
Hamoa Beach has excellent water quality due to its remote location near the town of Hana on Maui's east coast. There is minimal development in the area, no significant stream runoff entering the beach directly, and good open ocean flushing. The Hotel Hana-Maui (now Hana-Maui Resort) maintains the beach access but it is open to the public.
Hamoa Beach is a crescent-shaped bay with a mix of sand and rock. The beach faces the open ocean and can have strong currents and surf, especially during winter swells. There are no lifeguards. The steep staircase access from the road means this beach is less crowded than more accessible beaches.
Based on: Remote location, minimal development, no direct stream input, not regularly monitored by DOH
The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. East Maui receives significantly more rainfall than the west side, so rain-related water quality issues are more common in the Hana area. After heavy rain, nearby hillside runoff can affect nearshore water clarity. Always check the water visually before entering.
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.
100+ beaches and 25+ hotels across all 6 islands
⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — it is not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings on this site are estimates based on publicly available testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions. “No DOH Alerts” means no advisory is currently posted — it does not mean the water was tested and found safe. DOH only monitors a fraction of Hawaii’s beaches, and some areas have no regular testing at all.
Always verify current water quality conditions 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.
This site is a work in progress and we want to make it better. If you notice something that isn't working right, have a suggestion, or want to share local knowledge about a beach, please reach out.
When in doubt, don't go out. 🤙