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Honouliuli National Historic Site

National Historic Site · Honolulu County

77
Good
CampTow Safety Index · /100
Photo: Photograph by R. H. Lodge. Courtesy of Japanese Cultural Center of Hawai‘i / Hawaii’s Plantation Vil
88
Crime score
244.4 / 100k · low
70
Hazard score
Honolulu County · 2024
0
Direct deaths
From recorded 2024 events
2
Direct injuries
From recorded 2024 events
Safety briefing

Flash flooding is the clearest hazard to plan around at Honouliuli National Historic Site, with 8 recorded flash flood events and 5 additional flood incidents logged in Honolulu County — making water-related emergencies the dominant pattern by a wide margin. A single debris flow event on record underscores how quickly saturated hillsides can shift, adding another layer of risk when heavy rain moves through.

Before your visit, download the NWS Honolulu app and enable flash flood warnings so you receive real-time alerts even without cell signal coverage. Pack waterproof footwear with ankle support, since flooded ground and debris-covered paths can hide unstable surfaces quickly. If rain intensifies during your visit, move immediately to higher ground or your vehicle rather than sheltering near drainage channels, culverts, or low-lying trail sections.

From the park
A stone wall
This stone wall played a crucial role in the rediscovery of Honouliuli · NPS Photo
Satellite image of Honouliuli Gulch with a historic overlay illustrating Honouliuli's layout
Historic overlay illustrating the layout of Honouliuli Internment and POW Camp · National Register Boundary (NPS), Historic and Modern Features by Jeff Burton and Mary Farrell
View down the aqueduct at Honouliuli Gulch
An aqueduct separated prisoners of war from internees at Honouliuli Internment Camp. The aqueduct provided water for both internment and prisoners of war camps. · NPS photo

Top recorded hazards in Honolulu County

County data

From NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.

  • Flash Flood 8
  • Flood 5
  • Debris Flow 1
  • Heavy Rain 1

Gear keyed to this park's risks

Recommendations driven by the actual hazards above. As an Amazon Associate we earn from qualifying purchases.

Elevated cot + dry bag Flood and flash-flood events are a top risk at this location Shop on Amazon → Satellite GPS communicator Cell coverage at remote campgrounds is unreliable — SOS works anywhere Shop on Amazon →
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About Honouliuli National Historic Site

In 2026, Honouliuli National Historic Site is commemorating the 80th year since Honouliuli Internment Camp closed with community events that will take place throughout the year. Stay tuned on our website or social media to learn more and get involved.

Weather

The temperature ranges from 70°F/22°C to 85°F/29°C year round with light tropical showers common.

National Park Service → · Open in Maps →

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