Stromma operates the M/S S:t Erik, offering a range of boat tour services in Göteborg. The agency provides guided sightseeing tours that combine both bus and boat experiences, allowing visitors to explore the city's landmarks and natural beauty from multiple perspectives. Excursions are available in Gothenburg's archipelago, showcasing the scenic coastal landscapes and islands.
In addition to standard sightseeing, Stromma features culinary cruises that highlight local delicacies, providing an opportunity for guests to enjoy regional cuisine while taking in the views. The agency also organizes seasonal events, including Christmas cruises and unique experiences such as the Christmas Paddle to Liseberg, catering to various interests and occasions. Family-friendly activities are part of the offerings, with expert guides available to share insights into the local culture and history, enhancing the overall experience for participants.