Longshore currents run parallel to shore. Like offshore currents, they are considered standing currents, which means they rarely change direction if ever at all.

Longshore currents can move you far from your entry or planned exit location. To avoid a long surface swim or losing your dive party, you must determine the direction and speed of the current and plan your dive accordingly.

There are several indicators that can help you determine the direction of a longshore current. One indicator is the direction from which waves approach shore. If the waves approach the shore from the south, the current is likely to come from the same direction. Another indicator is the direction anchored boats face. Most boats are anchored from their bow, so they face against the current.