We just got back from our week in Gothenburg. We had a blast! We spent several days roaming the city. One day we rented a bike from the City's borrow system. There are kiosk stops around the city. You pay a fee and then ride from one to the other. Then walk around an area filled with shops and sites. Then borrow another bike. Great way to see the city! The Christmas markets were so festive! Lisburg was all light up for the holidays.
We drove down to Copenhagen for a day. It was a 3 hour trip one way but it's a beautiful city and worth the time. Another day we drove north to see Bohus Fortress and the small sailing island of Marstrand. We walked around the island and through the paths in the woods. It was beautiful!
We also took a Traditional Christmas dinner cruise (at lunch time so we could see the sights) around the southern Archipelagos. It was a great way to eat Traditional Swedish foods and to see the islands around the city.
All in all it was a fabulous trip! The weather remained between 1 degree to 3 degrees each day. (30-35 degrees F). We wore a jacket, gloves, hat and scarf everywhere we went and were fine. It was a great adventure for us all round!
Have fun and bundle up and you will be fine.