Nagu sits on the Archipelago Road between Pargas and Korpo. Buses from Turku run along the road and use the same ferries as cars, so it is possible to visit without driving.
In summer, boats also link Turku, Själö, and Kyrkbacken on some days. Cyclists often use Nagu as part of the Archipelago Trail; check ferry times before setting out, because the smaller island services can be seasonal or infrequent.