Spouting Horn

Spouting Horn is a south Kauai blowhole near Poipu, where waves push through a lava tube and send seawater high above the black lava shelf.

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Spouting Horn, Kauai

Spouting Horn is one of Kauai’s natural wonders. Located near Poipu Beach on the island’s south coast, this blowhole can shoot water up to 50 feet (15 m) into the air when waves crash into it. The water is forced up when the ocean flows under the lava shelf and is shot up through a small opening on the surface. The best times to see this natural phenomenon is during high tide and high surf.

Another hole nearby only makes an eerie groan instead of blowing water. An ancient Hawaiian legend tells that the coastline was once guarded by a giant moo (lizard). This moo ate people who swam or fished here. One day, a man called Liko went swimming here and the moo tried to attack him. Liko managed to swim under the lava shelf and escaped through the blowhole, but the giant moo got stuck in the small opening. The story goes that the moo is still there today, and its cries are of hunger and pain.

Key Features

South Kauai blowhole lookout in Poipu
Waves push through a natural lava tube in the black lava shelf
Spray can reach up to 50 feet when surf and wave direction line up
Known for a hissing or roaring sound as air and water move through the lava tube
Paved viewing area keeps visitors behind a safety rail
Free parking is available close to the lookout
Located along Lawai Road near the South Shore Visitor Center
Pairs easily with Poipu beaches, Koloa and Lawai Valley garden visits
Stay off the lava shelf because waves can surge without warning
Spouting Horn is known for blowhole spray, lava-rock shoreline, Kauai legend and quick south shore sightseeing

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Frequently Asked Questions

How does Spouting Horn work?

Waves rush into a lava tube below the shoreline and force seawater through a narrow opening in the rock, creating the vertical burst visitors see from the lookout.

Why does Spouting Horn make a sound?

Air and water moving through the lava tube create the hissing or roaring sound that gives the blowhole much of its character.

What is the legend of Spouting Horn?

A well-known Kauai legend connects the sound to a mo'o, or giant lizard, trapped beneath the lava shelf after chasing a young man along the coast.

When is the blowhole most active?

The spray is usually stronger when south shore surf is up and waves reach the lava shelf with more force. On calmer days, the spout may be smaller.

What can visitors see nearby?

The lookout is close to Lawai Valley garden check-in, Poipu beaches and south shore sunset viewpoints, making it an easy short stop during a Poipu or Koloa outing.