Papakolea olivine beach — water quality & hike conditions
📍 South Point (Ka Lae), Big Island — 2.5-mile hike required
Green Sand Beach has excellent water quality. The remote South Point location has no hotels, agriculture, or urban development. The open ocean cove is fully exposed to clean Pacific water. The DOH does not regularly monitor this beach, but the absence of pollution sources means bacteria risk is very low.
The physical hazards — wave surge, rocky entry, and powerful currents — are far greater risks than water quality here. Focus your safety assessment on ocean conditions, not bacteria.
Based on: Remote South Point location, no development, open ocean exposure, no known pollution sources
Trailhead: Drive to the end of South Point Road (off Hwy 11 between Captain Cook and Naʻalehu). Park at the end and hike ~2.5 miles along a dirt road/trail on the coast.
Difficulty: Moderate. Exposed terrain with no shade. Bring at least 2 liters of water per person and sun protection. Sturdy shoes required. The path is rocky lava and gravel.
Time: Allow 2–3 hours round trip on foot. Some locals offer ATV shuttle rides for a fee at the trailhead — this is not an official service but common.
What to expect: A dramatic cinder cone crater with green olivine sand at the base, accessible via a steep sandy descent. The descent itself can be challenging. Wave conditions vary — sometimes the cove is calm enough for a quick dip, other times surge makes any water entry dangerous.
The Department of Health recommends 72 hours after heavy rain before ocean entry. Even at remote Green Sand Beach, erosion and runoff after storms can temporarily affect conditions.
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health or any government agency. Ratings are estimates based on publicly available data, not real-time measurements.
Always verify with the Hawaii Department of Health Clean Water Branch before entering the water.
When in doubt, don't go out. 🤙