Did Cyclone Ditwah severely damage the southern coastal beaches.

No, the southern coastal beaches completely escaped the massive devastation caused by Cyclone Ditwah. The cyclone made landfall and primarily dumped its catastrophic rainfall over the central highlands and the eastern provinces. Places like Hiriketiya, Mirissa, and Galle were mostly entirely unaffected, aside from a few days of heavy rain and wind. There was no massive erosion, and the beaches remain as beautiful and fully operational as ever for tourists.