Best family beaches, hazards to know, and how to keep children safe in Hawaii's ocean
Waves that break directly onto the sand can knock children (and adults) down hard. Even small shorebreak can throw a child face-first into sand. Sandy Beach (Oʻahu) and Makena Big Beach (Maui) are beautiful but have dangerous shorebreak — not appropriate for children.
The #1 drowning cause in Hawaii. Teach older children to recognize the signs: choppy, discolored water moving away from shore through a gap in breaking waves. If caught, swim parallel to shore to escape. Practice this drill before going in deep water.
Black spiky sea urchins hide in reef crevices in shallow water. Children exploring rocky areas can step on them. Always wear reef shoes or water shoes in rocky entry areas. The spines break off and are painful to remove.
Box jellyfish arrive on Oʻahu south shore beaches predictably around 8-10 days after each full moon. Children's thinner skin means stings can be more intense. Check the jellyfish calendar before beach visits on the south shore.
After heavy rain, bacteria from urban runoff can elevate in ocean water. The DOH recommends 72 hours before swimming. Children's immune systems may be more vulnerable to waterborne bacteria. Extra caution is warranted after storms.
Free alerts when water quality changes — brown water advisories, bacteria warnings, and all-clear notices.
⚠️ Disclaimer
This guide is for informational purposes only. Always exercise independent judgment about ocean conditions. Safe to Swim Hawaii is not affiliated with the Hawaii Department of Health or any government agency.
When in doubt, don't go out. 🤙