Water quality status and bacteria risk rating
📍 Keoneloa Bay, Poʻipū, Kauaʻi
Shipwreck Beach (Keoneloa Bay) has excellent water quality. Located on Kauaʻi's dry South Shore near Poʻipū, the beach receives minimal rainfall and has no significant stream runoff. The open ocean exposure provides exceptional flushing, and the lack of nearby pollution sources keeps bacteria levels very low.
The primary concern at Shipwreck Beach is not water quality but strong currents and dangerous swimming conditions. The beach is unprotected from open ocean swells and has powerful lateral currents. The famous lithified sand cliffs at the east end are a popular but dangerous cliff jumping spot. The Grand Hyatt Kauai sits directly above the beach.
Based on: Dry South Shore location, no stream input, excellent ocean flushing, limited development runoff
The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. Shipwreck Beach is on Kauaʻi's dry South Shore and rarely has runoff issues, but Kauaʻi is one of the wettest places on Earth and heavy storms can affect even the south side. Always check the water visually before entering.
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⚠️ 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.
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When in doubt, don't go out. 🤙