The phytoplankton diversity was over all high at all stations along the Swedish west coast. Diatoms dominated in numbers at all stations. Especially the diatom Leptocylindrus danicus was common at all stations. At Å17, the outer most station in the Skagerrak, a few cells of species more commonly found in the North Sea were found. The integrated (0-20 m) chlorophyll concentrations were above normal at N14 Falkenberg and at both stations in the Skagerrak for this month. The integrated (0-10 m) chlorophyll concentrations that coincide with the depth of the hose samples were above what is normal at N14 Falkenberg and within normal at the other stations. The number of phytoplankton species was relatively high for the Baltic stations, but there were mainly small cells in low numbers. The chlorophyll concentrations were high for this month however, and the integrated concentrations (0-10 and 10-20 m) were above normal at several stations which did not really reflect the low total cell counts in the phytoplankton samples.