I would need the context, but it usually means "It's nice, despite that." or "However, it's nice." "The rain started this morning. It was nice, though. We had been dry for a long time." "He kissed her nervously. It was nice, though, she thought, because he was gentle"

I agree with ^^^ though at the end of a sentence means "on the other hand", "nevertheless", "nonetheless" and here are other examples "the the dog is scary, it's cute though" (the dog is scary, but it is cute) "you can borrow my jacket, it's hot in the room though" (you can borrow my jacket, despite that it is hot in the room) "I am sleepy, the party was fun though" (I am sleepy, yet on the other hand, the party was fun) hope this helps :)

" Though" at the end of a sentence often means "really" or "also"