The currents are formed when water rushes out to sea in a narrow path.  
This happens when there is a break in a near shore sandbar or the current is diverted by
a groin, jetty, or other barrier.  They can be narrow or more than 50 yards wide.  They vary in speeds, but on average are
1-2 feet per second. They have been measured as fast as 8 feet per second, which is faster than an Olympic swimmer!Rip
currents can pull swimmers hundreds of yards offshore. Some are present a few hours; others are permanent.
Rip currents are more prevalent after storms.
Information provided by NOAA.
For more information on Rip Currents, please visit the
National Oceanic and Atmospheric Administration,
www.ripcurrents.noaa.gov
A difference in water color
either murkier from sediments or darker
from greater depth
A difference in the waves -
larger choppier waves in the rip current
smaller, calmer waves in front of the bar

Rip Currents