The integrated (0-20 meters) chlorophyll a concentrations were normal for the season at most of the Skagerrak and Kattegat sampling sites. The phytoplankton species diversity and cell density were very low as last month. Naked dinoflagellates (10-20 μm) and cryptomonads were still most abundant together with species from the genus Pyramimonas. The integrated (0-20 meters) chlorophyll a concentrations from the Baltic Sea were below normal for the season at most sampling sites. Cryptomonads, Pyramimonas spp. dominated at all stations in the Baltic. The abundance of the genus Chrysochromulina was common south of Gotland. Calliacantha natans was very common in the Kalmar Sound.