1 Hotel Hanalei Bay (formerly St Regis), Princeville — ranked by water quality and bacteria risk
The 1 Hotel Hanalei Bay (formerly the St. Regis Princeville) occupies a bluff-top position overlooking Hanalei Bay, one of the most photographed stretches of coastline in Hawaii. The hotel completed an extensive renovation and rebranded in 2022, bringing a sustainability-focused ethos to one of Kauaʻi's most dramatic settings.
The north shore of Kauaʻi receives more rainfall than almost anywhere in the inhabited Hawaiian Islands, which creates the lush green mountain backdrops that make Hanalei famous. However, this rainfall also means Hanalei Bay's water quality varies significantly — the Hanalei River discharges into the bay and carries elevated bacteria after storms. The reef-protected beaches further west, like Tunnels and Keʻe, tend to have better water quality because they are not influenced by major stream outlets.
From 1 Hotel Hanalei Bay in Princeville, Hanalei Bay is reached by driving down the steep Princeville hill to the bay floor, about 10 minutes. Hideaways Beach trailhead is within walking distance of the hotel. Anini Beach is about 10 minutes east via Anini Road. For Tunnels Beach and Keʻe Beach, continue west on Highway 560 past Hanalei — Tunnels is about 20 minutes and Keʻe is 25 minutes at the road's end. Permits are required for Hāʻena State Park access.
Best snorkeling: Tunnels Beach (20 minutes west, reef, turtles, summer is best). Most reliable calm water: Anini Beach (reef-protected lagoon, 10 minutes east). Most secluded: Hideaways Beach (steep trail from the hotel). Most dramatic scenery: Keʻe Beach (Nā Pali cliffs, permits required).
After heavy rain, bacteria levels spike at beaches near streams and river mouths. If a brown water advisory is active near 1 Hotel Hanalei Bay (formerly St Regis), Princeville:
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Always verify current water quality conditions with the Hawaii DOH Clean Water Branch before entering the water.
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