The expedition was part of the Swedish regular marine monitoring programme and covered Skagerrak, Kattegat and the south-western part of the Baltic Proper. Data presented in this report have been subject to preliminary quality control procedures only. Surface water temperatures were somewhat above normal for the season in all investigated areas. All nutrients in the surface layer had low concentrations which is normal for the season. The oxygen condition in the Kattegat bottom water was good while the concentrations had decreased somewhat since the previous expedition in the southern Baltic Sea. The next expedition is planned to take place August 12-15.