A narrow gap of darker, seemingly calmer water flanked by areas of breaking waves and whitewater. A channel of churning/choppy water that is distinct from surrounding water. A difference in water color, such as an area of muddy-appearing water (which occurs from sediment and sand being carried away from the beach).

In 2026, water safety experts emphasize that rip currents are often invisible to the untrained eye, but there are several telltale signs. Look for a channel of churning, choppy water that looks different from the surrounding waves. Another sign is an area having a notable difference in water color, often appearing darker or murkier because the current is pulling sand and debris away from the shore. You might also see a line of foam, seaweed, or debris moving steadily seaward, or a noticeable break in the incoming wave pattern where waves are not breaking. If you see a "river" of flat water between two areas of breaking waves, that is a classic rip current. In 2026, many beaches use AI-monitored cameras to flag these zones, but the golden rule remains: if you see a gap in the waves, do not assume it is the safest place to swim.