Hawaii Community guide

Sand Island Beach Park

Honolulu, Honolulu County · 96819

Honolulu harbour island park whose past as quarantine station, military base and dump leaves sea glass and pottery on the shore.

About Sand Island Beach Park

Sand Island, at the mouth of Honolulu Harbor, has been a quarantine station, a coastal defence site and wartime internment camp, and a dump until a clean-up in the 1970s. That history shows up on its beaches, which a regular collector rates as the best sea glass spot on Oʻahu.

Sea glass at Sand Island Beach Park

Rare cornflower blue, milk glass, UV glass, colourful sea pottery and shells reported; some rocks on the shore have glass and pottery embedded in them.

Visiting Sand Island Beach Park

Toilets
Restrooms available (To-Hawaii).
Safety
Check the tide times before you go and head out on a falling tide, so you're never cut off. Keep away from the bottom of cliffs, wear sturdy shoes on rocks, and follow the collecting rules above.
From the community

Hunters' photos of Sand Island Beach Park

From the community

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      Sources

      Last updated 24 October 2026

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