Allt på Sjön Gustavsberg Past boat show Kattholmen, Odelbergs väg 4. 134 40 Gustavsberg September 2 - 4, 2022 09:00 - 18:00 Every year, the entire boating industry is invited to Gustavsberg’s entire boat industry to show off in Gustavsberg harbour. There are exhibited motor and sailboats of all sizes, both from Swedish and foreign shipyards. There is a large accessory exhibition with exhibitors of marine products and services only. There is a restaurant and café on site.