The city of Pori is well connected by air and there are a number of flights from Stockholm in Sweden. Since it is a port city, it is also possible to reach this city by water. When it comes to moving inside the city of Pori, tourists should not have any problem at all. There are a number of public buses, run by the local authorities. They certainly will help you to move from the center of the city to any area which you might want to.
On the other hand, it also makes sense to look into moving inside the city with the help of public and private taxis, which are also available in plenty. At the end of the day, the moot point is that moving around within the city is not a problem at all.