Whether you are arriving from the south (Gdańsk) or the north (Gdynia) you are very likely to make the approach to Sopot via the main Al. Niepodległości road. This can be very busy during peak times. Sopot city centre is quite small and, particularly during the summer months, the centre is snarled up with traffic. There is street parking if you can find it with the area closest to the centre subject to parking tickets. There are guarded car parks which you should seriously consider if leaving your car for a prolonged period.