Discoloured brown water caused by sand stirred up from the bottom.
Foam on the surface extending beyond the break.
A rippled appearance, with waves breaking on both sides of the rip, but not inside the rip.
Items on the water's surface, floating seaweed on the surface of the rip.
http://media.smh.com.au/national/nati... How to spot a rip in the surf. Very important