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OʻAHU · WINDWARD · HAUʻULA

Mākao Beach

The quiet windward-Oʻahu beach in Hauʻula — Surfrider BWTF community testing

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
Mākao
Last sample 2026-08-23 · 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 community testing

Mākao is the quiet beach in Hauʻula on windward Oʻahu, between Punaluʻu and Lā‘ie — primarily a local spot rather than a tourist destination. 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
Windward stream input + reef-sheltered lagoon

Mākao lies in the Hauʻula stretch of Oʻahu's windward coast, with a reef-sheltered shoreline and streams in the surrounding watershed. Rain can carry runoff toward the coast.

The reef, water color and a past bacteria result do not establish current water quality. Read the collection date and source report in Community Water Testing, and check current DOH advisories separately.

🌧️
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 Mākao Beach. 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 Mākao Beach 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

Sandy entry from the central beach. The reef-protected lagoon is shallow at low tide. Stay away from stream-mouth areas on either end. Watch for sea urchins on the rocky margins.

When It's at Its Best

Local families visit on weekends. The beach is quieter than Punaluʻu Beach Park to the south. Compare current advisories and dated samples for each beach separately.

Getting There

Off Kamehameha Highway in Hauʻula, between Punaluʻu and Lā‘ie. Roadside parking. About 50 minutes from Honolulu via Likelike Highway or H-3. No facilities on-site.

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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