Water quality, bacteria risk, and surf conditions for this classic Honolulu break
📍 Ala Moana Beach Park, Honolulu, Oʻahu
Ala Moana Beach Park carries a moderate bacteria risk (3 out of 5) overall, driven primarily by proximity to the Ala Wai Canal. The canal collects runoff from a large urban watershed — Waikiki, Manoa Valley, and surrounding Honolulu neighborhoods — and discharges directly into the ocean near the east end of the park.
The surf break itself (offshore at Ala Moana Bowls, near Magic Island) has better water quality than the nearshore beach near the canal mouth. Open ocean flushing at the break reduces bacterial concentrations. However, after significant rain, the entire area is affected.
The central and western sections of Ala Moana Beach Park (away from the canal) generally test better. Avoid the area near the canal mouth entirely.
Based on: DOH beach monitoring, Ala Wai Canal discharge proximity, urban watershed runoff data
Ala Moana Bowls breaks off the outer reef parallel to Ala Moana Beach Park, near Magic Island. It is a left-hand breaking wave that peels along the reef — one of the most beloved longboard waves in Honolulu. The break works best on south to southwest swells, typically from May through September, though it can fire at other times of year.
Longboarders and intermediate surfers. Not a beginner wave. The crowd can be competitive during good south swells.
South swell season (May–September) brings the most consistent waves. Winter brings larger north swell but Bowls is more sheltered from the north.
Bacteria risk at the break is elevated within 72 hours of rain due to Ala Wai Canal outflow spreading into the surf zone. Wait for dry conditions and clear water before surfing.
The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. This is especially critical at Ala Moana, where the Ala Wai Canal rapidly elevates bacteria levels after storm events. If the water appears brown or murky, do not enter regardless of how much time has passed since rain.
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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.
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.
No beach or surf break in Hawaii can be described as definitively suitable for all visitors — conditions change rapidly.
When in doubt, don’t go out. 🤙