If the waves are 0-1 feet high (0-0.3 meters), the sea is “doable” and safe for swimming. If the surf height is 2-3 feet (0.8-1 meters), ocean conditions are questionable.
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Read the beach safety signs at the entrance to the beach. Once on the beach, look for beach warning flags, often posted on or near a lifeguard's stand. A green flag means water conditions are safe and other colors mean conditions are not safe. These flags are there to protect you.
Beach advisories and beach closures occur when water testing reveals the presence of one or more contaminants that exceed healthy standards. During a beach closure, water conditions are deemed unsafe for swimmers and other users.