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MAUI · WEST SIDE · SOUTH LAHAINA

Shark Pit (Polanui-Uhailio)

Polanui-Uhailio surf spot south of Lahaina — locally called Shark Pit

Community Water Testing
The dated readings below come from the Surfrider Foundation’s volunteer Blue Water Task Force. They are separate from current DOH advisories and do not describe today’s water quality. Check the live DOH status above before using these samples for planning.
Community Testing · Surfrider BWTF
Polanui-Uhailio (Shark Pit)
Last sample 2026-10-14 · view full report →
<10 (unit not supplied by feed)
dated sample
About: Volunteer water-quality monitoring by the Surfrider Foundation's Blue Water Task Force. Source method and units are preserved when supplied. Missing feed units remain unknown. Dates vary by sample point; these observations do not establish current conditions or cancel an official advisory.
Source: Surfrider Foundation Blue Water Task Force · Widget rendered 2026-10-25
Water-quality sources
Check the dated sample
BWTF tested · monthly

Shark Pit (the proper name is Polanui-Uhailio) is a surf spot south of central Lahaina, named for the dark reef silhouettes visible from the bluff above — not for actual shark activity. 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, no streams nearby

Shark Pit lies on the West Maui coast between Lahaina and Olowalu, with an offshore reef break and a bluff above the shoreline.

Open-coast exposure and distance from the harbor do not establish current water quality or post-fire impacts. Read each community sample with its collection date and source report, and check current DOH advisories separately.

🌧️
After Rain — Check Conditions
After rain: Avoid ocean contact during or immediately after heavy rain, near runoff, or when water is brown or cloudy.
Current notices: Follow any DOH advisory affecting this beach until DOH lifts it.
Before returning: Elapsed time and clear-looking water do not establish water quality. Check current DOH guidance and the live status above.
Testing Coverage

The Hawaii Department of Health does NOT routinely test Shark Pit (Polanui-Uhailio). 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 Maui chapter.

BWTF samples Shark Pit (Polanui-Uhailio) monthly 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

Rocky entry along the bluff. This is a surfer's spot — paddle out is across the reef. Not a swimming beach. Watch for sea urchins on the rocks.

When It's at Its Best

Winter west swells and summer south swells both produce waves here. Smaller, more manageable than Honolua Bay further north. Quieter than Lahaina town's surf spots.

Getting There

Off Honoapiʻilani Highway south of Lahaina, between Olowalu and central Lahaina. Roadside parking. Walk down the bluff trail. Combine with Olowalu (5 minutes south) for a longer surf session.

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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