The Trench samples collected at five places like Chandrapadi, Manickabangu, Pillaiperumalnallur, Chinnamedu and Vanagiri areas of east coast of Tamilnadu, India were analysed for tracing paleotsunami signatures. The importance was given because these areas were highly affected both by frequent occurrence of storm surges and tsunami. An attempt was made by making trenches at five locations next to coastal dunes on seaward side upto the depth of watertable to find the specific type of layers. The areas like Vanagiri, Chinnamedu having three evidences of tsunami event including the recent tsunami occurred on 26th of December 2004 whereas Manickabangu and Pillaiperumanallur shows two signatures but at the same time Chandrapadi location having only one at the top and the remaining two are below the hard lateritised layers. This has been suspected that the coast may have undergone a long period of exposure for weathering that is why they may not be comparable with that of other locations. The exact date may be deciphered once after OSL C14 dating in these regions.