Algal epiphytes were examined for 12 months at Shura El-Roweysia and several tidal levels on the shore of South Sinai dominated by Laurencia obtusa and Cystoseira myrica. Sixty seven species of the epiphytes were recorded (41 Bacillariophyta, 20 Cyanophyta, 3 Chlorophyta and 3 Pyrrhophyta). An inverse relationship between percentage cover of L. obtusa and their epiphytes were observed to be affected by desiccation stress due to frequent emersion of the intertidal flat and exposure to strong radiation, while high cover percentage of C. myrica was associated with the high number of epiphytes.