Just over the Italian/Slovenian border there's camping Adria, on the sunny part of the Milje peninsula. You can get there via the Skofije border crossing, or maybe take the easier crossing at Lazaret.
Recommended by our region specialist
"Situated at Trieste Bay, in the small Slovenian coast between Italy and Croatia. Large Olympic sized pool next to the sea. Visit Trieste and the lovely cities Koper and Piran."
The surrounding area of Adria
Part of the Slovenian coast is the pleasant peninsula of Milje. This well sheltered piece of coastline is perfect to combine a beach holiday to some culture. The Italian history of this part of Slovenia is still present in many places. Good examples are the villages of Koper, Piran, Izola and Portoroz, which has to be visited by boat.