Water quality, conditions, and what to know before you go
Kailua gets consistent trade wind swell that produces short, fun waves. Not a premier surf destination but rideable on many days. Windward coast catches east and northeast swells year-round.
Moderate shore break possible during larger swells. The sandy bottom makes wipeouts less dangerous than reef breaks. Suitable for intermediate surfers comfortable with wind chop.
Kawainui Marsh and stream runoff can elevate bacteria levels, especially after rain. Surfers at Kailua face consistent exposure through submersion. Avoid surfing after heavy rain when stream discharge is high.
The Hawaii Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. This applies to all ocean activities including surfing. Runoff carries bacteria from land into nearshore waters.
When conditions are clear, Kailua Beach has great options for surfing. Check the water quality above, then book with confidence.
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Safe to Swim Hawaii provides water quality information based on publicly available DOH data and seasonal patterns. This is not medical or safety advice. Always check current conditions, obey posted signs, and use your own judgment before entering the ocean. Privacy Policy
⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings 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 DOH Clean Water Branch before entering the water.
When in doubt, don't go out. 🤙