In Spain, all or almost all the beachs allow top-less.
". I've seen many a female (whether they're Spaniard, French, Swedish, or whatever) on regular beaches in Spain without their tops but never without their bottoms
And top-less men also.
And we have a lot of nudist beaches, but usually you won't stumble into any unless you try to, because they are (or were) semi-legal only. Thus, there are nudist beaches only when people claim for them, and the Town Councils usually "allow" them in the more distant, worse communicated and worse sand beaches.
There are exceptions like in Gijón (asturias), where they have one just out of the city, although with almost no sand, lots of seaweed, small, with sightseers (with a telescope), and so on.
I have been to many, because I like nudism, but generally it's that way. Another exception is "La Playa Salvaje" out of Bilbao, which is half of a huge beach in a great environment. Half is nudist and half is not, because half belongs to a Town COuncil and the other doesn't.
I am not pretty sure about nudist places in the South, cause I don't go South since long time ago, but in the North there are also a good number of them ,according to my experience, at least in Cataluña, Asturias, Cantabria and the Basque Country.