Holei Sea Arch Collapses into Pacific at Hawaii Volcanoes National Park

Hōlei Sea Arch Collapses Into Pacific Ocean at Hawaii Volcanoes National Park

A 90-foot natural lava rock formation known as the Hōlei Sea Arch has collapsed into the Pacific Ocean at Hawaii Volcanoes National Park, according to a National Park Service news release issued Oct. 1, 2026. The landmark, carved by wind and sea erosion from a 550-year-old lava flow, disappeared between Sept. 23 and Sept. 27, 2026. Park officials noted that the exact time of the collapse remains unknown, though it may have occurred while the park was closed for Tropical Storm Nolo on Sept. 23 and 24.

Earthquakes and Erosion Damaged the Sea Arch

The coastline flanking the sea arch showed signs of instability for years prior to the collapse. Earthquakes from the 2018 Kilauea eruption and summit collapse damaged the surrounding cliffs. In 2020, the park closed the viewing area due to the formation of new cracks. Subsequent damage occurred in 2022 when massive waves detached a significant portion weighing nearly half a ton from the arch structure. Located at the end of Chain of Craters Road against the cliffside, the arch formed when molten lava hit the ocean, cooled, and hardened into rock.

Park Officials Emphasize Dynamic Volcanic Terrain

Park officials maintain that despite its iconic status, the arch was always a temporary feature of the area. Ben Hayes, interpretation and education manager at Hawaii Volcanoes National Park, previously told USA Today in 2022 that changing terrain is a fundamental aspect of visiting the park. Following the collapse, the National Park Service closed the surrounding area and warned visitors to stay away from the unstable cliff edge due to serious falling hazards.

Frequently Asked Questions About Hōlei Sea Arch

When did the Hōlei Sea Arch collapse?

The National Park Service reported that the arch was still standing on Sept. 23, 2026, but was gone by Sept. 27, 2026. Officials believe the collapse may have happened while the park was closed for Tropical Storm Nolo on Sept. 23–24.

How was the Hōlei Sea Arch formed?

The 90-foot arch was created from a lava flow dating back 550 years. When molten lava entered the Pacific Ocean, it cooled and hardened into rock, which was subsequently shaped by wind and sea erosion over centuries.

Is the viewing area still accessible to visitors?

The viewing area and surrounding coastline are currently closed to the public. Park officials have issued warnings for visitors to stay away from the unstable cliff edge due to severe falling hazards.