Six species of benthic marine Chlorophyta and Phaeophyceae are recorded for the first time from the coast of Namibia: Ectocarpus fasciculatus Harvey, Feldmannia irregularis (Kützing) G. Hamel, Bachelotia antillarum (Grunow) Gerloff, Straguloria clavata (Harvey in Hooker) Hamel, Entocladia leptochaete (Huber) Burrows and Ulvella lens P. Crouan & H. Crouan. Data concerning local and world distribution of these species as well as some taxonomical remarks are provided. Keywords: algues marines benthiques, Namibie, Chlorophyta, Phaeophyceae.