Yes, apart from having a beach, there is also a pool area in the village, at just a short distance from the campsite. It has a 50 metre pool, as well as a children's pool and a water slide. Not big but OK if you are a family with kids. There is a kiosk with fast food at the entrance.
I have not been to this, but no page on Hällevik would be complete without mentioning the trad jazz festival that has taken place one of the first August weekends annually since 2004. It is the only regular New Orleans inspired festival in the far south of Sweden and increasingly popular so booking accommodation in advance is a must. The programme is on the website below and venues are the restaurants in the harbour area.
Hällevik, with a history starting in the 13th century, is well know for those of us who like fish since the Hanö Bay fishermen have got quite a reputation for smoked salmon in particular, and that you can find in several Swedish supermarket chains. Having said that, it is nicer to come here and try more local stuff too. The village houses around 750 souls and the most famous person to have a house here is the national footballer Christian "Chippen" "Wilhelmsson of Anderlecht, Nantes, Bolton Wanderers and Deportivo de la Coruna fame amongst other clubs. He started his senior career with local team Mjällby and I guess he can now enjoy quiet life in the village from time to time and it is certainly a break from Saudi Arabia where he has ended up playing as I write this.
The village has some seriously quaint cottages to look at and is very "stroll friendly". Between the football ground and the harbour there is a whole pine forest full of wooden summer houses and the lovely Hälleviks Havsbad hotel, all criss crossed by minor roads and paths. As you then get to the harbour and the rest of the village, there are fisherman's cottages and the harbour itself with its smoke house. In summer when the guest harbour is full of boats and the restaurants have their verandas open, it is of course more lively than at other times, and this is also when local galleries are more open for business, as is the local little fisheries museum. Still, if you need to get away from it all, you can come here any time to rest.
Hällevik's beach is no Copacabana by any means, but a very nice little Baltic Sea beach. I very much enjoyed walking along it, and it stretches from one end of the village centre to the campsite further out so there is enough space to frolic on even on a sunnier day than when I happened to visit it. The sea is quite shallow here so it is ideal for young children, but there is a long jetty for those who need more "instant depths" too, although no real diving possibilities. There is a toilet block and a playground on the beach, and as you are close to the villlage and the hotel Hanöbris, you can always find something to eat at either.