Water quality status and bacteria risk rating
📍 In South Maui between the Grand Wailea and the Four Seasons Maui
Wailea Beach is one of Maui's cleanest swimming beaches. The open South Maui coastline receives good wave action for natural flushing, with no streams or significant runoff sources feeding into the beach area.
The Wailea resort corridor uses modern wastewater treatment systems, unlike older areas of Maui that rely on cesspools. There is no agricultural runoff or industrial discharge affecting this stretch of coast. DOH routine monitoring consistently shows clean results.
Based on: DOH Tier 1 monitoring, modern resort wastewater infrastructure, no stream discharge
Even at low-risk beaches like Wailea, the Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. Wailea is well-protected from runoff due to South Maui's drier climate and lack of streams, but island-wide severe weather can still affect any coastal area temporarily.
Wailea Beach sits on Mauiʻs dry leeward coast between the Grand Wailea and Four Seasons resorts. It consistently ranks among Hawaiiʻs cleanest swimming beaches for water quality because there are no streams, rivers, or storm drains emptying into the water here.
South Maui receives less than 15 inches of rain per year — far less than the wet side of the island. This means fewer runoff events and less bacteria washing into the ocean. The resort corridor also uses modern wastewater treatment instead of the cesspools still common in older parts of Maui.
Wailea vs. Kaʻanapali: Both are resort beaches, but Kaʻanapali has slightly higher bacteria risk due to Hanakaoo Beachʻs proximity to storm drain outlets. Waileaʻs geography gives it an edge for water quality. See our full Wailea vs. Kaʻanapali comparison.
After the 2023 Lahaina fire: Wailea Beach was not directly affected by fire debris or runoff. The contamination concerns were concentrated on West Mauiʻs coast near Lahaina and Kaʻanapali, miles north of the Wailea resort area.
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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 or any government agency. 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. “No DOH Alerts” means no advisory is currently posted — it does not mean the water was tested and found safe. DOH only monitors a fraction of Hawaii’s beaches, and some areas have no regular testing at all.
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, don't go out. 🤙