A 45-year-old vessel was carrying 2,500 tones of fuel when it sank off the Island of Salamis on Sunday.
By Wednesday, a thick oily tide had covered stretches of the Athens Riviera several miles away and the usually packed beaches were empty.
The coast guard said authorities had sealed the shipwreck on Tuesday and there was no further spillage.
Privately-owned tank trucks are working to clean up the pollution.
Tags: Athens Riviera, Greek, OIL SPILL