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OʻAHU · DIAMOND HEAD · HONOLULU

Makalei Beach Park

The pocket beach just east of Diamond Head Lighthouse, tested biweekly by Surfrider Oʻahu

Community Water Testing
The Hawai‘i Department of Health does not run routine bacteria-testing here. The readings below come from the Surfrider Foundation’s volunteer Blue Water Task Force, which fills coverage gaps DOH doesn’t reach.
Community Testing · Surfrider BWTF
Makalei Beach Park
Last sample 2026-09-06 · view full report →
<10 MPN/100mL
within threshold
About: Volunteer water-quality monitoring by the Surfrider Foundation's Blue Water Task Force. Method: IDEXX Enterolert (MPN/100mL). Threshold: 130 MPN/100mL Beach Action Value — matches Hawaii DOH. Sampling: monthly (Kauaʻi/Maui), biweekly (Oʻahu).
Source: Surfrider Foundation Blue Water Task Force · Updated 2026-09-14
Water-quality sources
Check the dated sample
BWTF tested · biweekly

Makalei is the pocket beach east of Diamond Head Lighthouse, popular with locals for its quiet character and proximity to Honolulu. Check the Community Water Testing section for the sample date, result and full Surfrider report. A sample describes the water collected at that place and time; it does not establish today's water quality. Check the live DOH status above separately.

Why the Readings Run the Way They Do
Open coast and residential drainage

Makalei sits on the eastern flank of Diamond Head, exposed to the open ocean. A fringing reef lies offshore, with residential streets and Diamond Head Road above the beach.

Runoff can reach the beach through the surrounding drainage after rain. Open-ocean exposure does not establish current water quality; use the dated community samples and current DOH advisories as separate sources.

🌧️
After Rain — Wait Times
Light rain: 72 hours minimum, then visually verify the water has cleared.
Moderate rain: 4–7 days.
Storm or Kona low: wait until the water returns to clear blue-green visually. Can take 1–2+ weeks in extreme cases.
Testing Coverage

The Hawaii Department of Health does NOT routinely test Makalei Beach Park. The community-tested readings on this page come from the Surfrider Foundation Blue Water Task Force, a volunteer-led monitoring program run by the Surfrider Oʻahu chapter.

BWTF samples Makalei Beach Park biweekly using the IDEXX Enterolert method (MPN/100mL), and compares results against the same 130 Beach Action Value DOH uses statewide. See our overview of citizen water-quality testing in Hawaiʻi for the methodology and how BWTF data fits with DOH coverage.

Practical Notes
Where to Enter

Steep sand entry — not as gentle as Waikiki. The fringing reef creates a swimming pool at high tide. Avoid the immediate base of the lighthouse cliffs (rocks, urchins).

When It's at Its Best

Summer mornings on a small south swell. The east side stays surfable on most days. Winter brings the occasional north-wrap; the lighthouse blocks most of it. Snorkeling is decent on the calmest days.

Getting There

Off Diamond Head Road past the lighthouse. Limited roadside parking. About 5 minutes east of Waikiki by car. Bus route 14 stops at the top of Diamond Head Road; walk down.

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⚠️ Important Disclaimer

Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health, the Surfrider Foundation, or any government agency. Bacteria readings on this page come from the Surfrider Blue Water Task Force, a volunteer-led monitoring program. Readings are point-in-time samples; conditions change with weather, runoff, and wave patterns. They are not real-time measurements and may not reflect current conditions.

Always verify current water quality conditions with the Hawaii DOH Clean Water Branch and BWTF directly before entering the water.

This site does not recommend or advise anyone to swim at any beach. We share publicly available data and geographic analysis so you can make your own informed decisions. By using this site you accept full responsibility for your own safety. See our Terms of Use for full details.

When in doubt, don't go out. 🤙

© 2026 Safe to Swim Hawaii · Independent passion project · safetoswimhawaii@gmail.com