Lexicon

Undertow

Undertow is the return flow of seawater being pulled back to sea by tidal forces. Undertow is an erosive force removing large deposits of sediment from a shoreline and depositing it far out to sea. Strong undertow is impossible to fight and can often not be seen from shore.

Point Reyes Strong Undertow

Point Reyes National Seashore is known for its strong undertow into the Pacific Ocean.