What to know before you go
Kaʻanapali Beach is Maui’s most famous resort beach, stretching roughly 3 miles along the west coast. The beach is fronted by major resort hotels including the Sheraton, Hyatt Regency, Marriott, and the Whalers Village shopping complex. Black Rock (Puʻu Kekaʻa), a volcanic cliff rising 60 feet from the water, divides the beach and is the most popular snorkeling and cliff-jumping spot on this stretch of coast.
The nightly cliff-diving ceremony at the Sheraton, where a diver leaps from Black Rock at sunset, draws crowds but also inspires visitors to attempt their own jumps. The landing zone has submerged rocks, the current around the rock is unpredictable, and multiple injuries have occurred from recreational cliff jumping here.
Snorkeling along the south face of Black Rock reveals abundant reef fish, turtles, and occasionally reef sharks. The snorkeling is best in the morning before wind chop develops. Stay on the south side of the rock where conditions are calmer and the current less pronounced.
North swells wrap around the island and create shore break and currents along the beach, particularly at the north end. The current around Black Rock intensifies, making cliff jumping more dangerous. Post-fire runoff concerns are highest during winter rains. Whale watching from the beach is excellent from December through April. Water temperatures drop to 75–76°F.
Generally calm with excellent snorkeling at Black Rock. Water temperatures reach 79–80°F. Occasional south swells can create moderate conditions. The beach is at its busiest during summer, and space in the water near Black Rock can feel crowded with snorkelers, paddleboarders, and catamaran tours operating simultaneously.
| Lifeguards | Yes |
| Nearest Hospital | Maui Health (Lahaina urgent care 3 mi) |
| Cell Coverage | Excellent |
| Emergency | Call 911 — Ocean Safety: (808) 723-8170 |
Snorkelers at Black Rock: Stay on the south (sheltered) side of the rock formation. Do not attempt to snorkel around the north side where currents accelerate. If you feel current pulling you, swim toward shore rather than fighting the current. Stay close to the rock face where the water is calmer.
Cliff jumpers: The nightly ceremony by a trained professional is one thing. Tourist cliff jumping is quite another. Submerged rocks, unpredictable currents, and the force of a 20–40 foot drop make this activity hazardous. If you choose to jump, check the depth first, never jump headfirst, and never jump when waves are pushing against the base of the rock.
Swimmers after rain: Following the 2023 Lahaina fire, post-rain runoff carries contaminants from the burned watershed into the ocean. Monitor DOH advisories and avoid swimming near stream outfalls within 72 hours of rainfall.
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 Kaʻanapali Beach and every beach in Hawaiʻi.
Strong currents at Black Rock (Puʻu Kekaʻa). Shore break at north end. Post-Lahaina fire runoff concerns. Honokowai Stream bacteria after rain.
Yes. Nearest hospital: Maui Health (Lahaina urgent care 3 mi). Cell phone coverage: Excellent.
Winter: North swells create strong currents and shore break at the north end, cliff jumping at Black Rock becomes more dangerous. Summer: Generally calm with good snorkeling at Black Rock, warm water, occasional south swells
Swimmers at Black Rock should stay close to the rock face. The current north of Black Rock pulls swimmers out. After the 2023 fire, monitor runoff advisories.
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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.
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When in doubt, donʻt go out. 🤙