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SAFETY PROFILE · Oʻahu

Waimanalo Beach Hazards

What to know before you go

Overall Risk Level
Waimanalo Beach Moderate
Lifeguards: Yes
Island: Oʻahu
Specific Hazards at This Beach
Long shore break zone
Man-o-war jellyfish common
Car break-ins reported
Strong longshore current
Seasonal Danger Patterns

Winter (November – March)

Wrap-around swells can create shore break, generally calmer than north shore

Summer (April – October)

Beautiful, long beach with gentle waves, popular for bodyboarding

Facilities & Emergency Info
LifeguardsYes
Nearest HospitalAdventist Health Castle (5 mi)
Cell CoverageGood
EmergencyCall 911 — Ocean Safety: (808) 723-8170
Who Should Be Cautious Here

Do not leave valuables in cars. The longshore current can move swimmers far from their entry point — note landmarks before entering.

Nearby Alternatives If Conditions Are Bad Today
Bellows Beach (similar conditions, military security)
Kailua Beach (more facilities, lifeguarded)
⚠️ The 72-Hour Rain Rule

After heavy rain, bacteria and pollutants from runoff contaminate coastal waters. Wait at least 72 hours after heavy rain and until the water clears before entering. This applies to Waimanalo Beach and every beach in Hawaiʻi.

FAQ 1

What are the biggest dangers at Waimanalo Beach?

Long shore break zone. Man-o-war jellyfish common. Car break-ins reported. Strong longshore current.

FAQ 2

Does Waimanalo Beach have lifeguards?

Yes. Nearest hospital: Adventist Health Castle (5 mi). Cell phone coverage: Good.

FAQ 3

What are conditions like at Waimanalo Beach in winter vs summer?

Winter: Wrap-around swells can create shore break, generally calmer than north shore. Summer: Beautiful, long beach with gentle waves, popular for bodyboarding

FAQ 4

Who should be cautious at Waimanalo Beach?

Do not leave valuables in cars. The longshore current can move swimmers far from their entry point — note landmarks before entering.

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⚠️ Important Disclaimer

Safe to Swim Hawaii is an independent passion project — it is not affiliated with the Hawaii Department of Health, any entity mentioned on this page, or any government agency or hotel brand. Water quality ratings on this site are estimates based on publicly available testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions.

Always verify current water quality conditions with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only and should not be the sole basis for any swimming decisions.

When in doubt, donʻt go out. 🤙

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