Bacteria risk, shorebreak dangers, and DOH advisories
📍 Makena State Park, Maui — South Maui
Makena Big Beach (Oneloa) has low bacteria risk — one of the cleanest large beaches on Maui. There is no significant freshwater stream discharge, the surrounding land is largely undeveloped state park, and open ocean currents provide excellent water exchange.
DOH advisories are rare at Big Beach. The remote location, lack of urban development, and powerful offshore circulation keep bacteria counts consistently low. Even after rain, the beach recovers quickly.
Based on: No freshwater discharge, undeveloped state park, open ocean exposure, DOH Maui monitoring records
Even though Big Beach has excellent baseline water quality, the 72-hour post-rain rule still applies. After heavy Maui rain, surface runoff from the parking area and surrounding land can briefly elevate bacteria. The beach recovers faster than most — but when in doubt, wait.
Big Beach is notorious for its powerful shorebreak. Waves that look manageable from shore hit hard when they break directly on the steep sand. This beach accounts for numerous serious injuries every year.
Watch from shore for at least 15 minutes before entering — observe wave patterns, sets, and how other swimmers are being affected.
Body surf parallel or at an angle — never dive headfirst into shorebreak at Big Beach.
Exit the water when you feel tired — exhaustion increases risk from unexpected waves.
Do not bring small children into the surf zone at Big Beach. The shorebreak is too powerful for young kids.
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent project not affiliated with the Hawaii DOH. Ratings are estimates — not real-time measurements.
Verify with the Hawaii DOH Clean Water Branch before swimming.
When in doubt, don't go out. 🤙