Strandbryggan is an awesome little cafe right on the water that is located at the corner on Strandvagen and Djurgardsvagen right next to the bridge that goes to Skansen. Although it's a little pricey (everything is in Stockholm), I would highly recommend this place because the food is excellent and it's a great place to enjoy a lunch watching the people and boats pass by. They have incredile steak and the burgers are incredible as well. Grab a table or lounge on a couch right on the water and soak some sun.