From your holiday home you will of course go once to the Mediterranean Sea. Along the coast with its wide sandy beaches are cozy villages with inviting terraces. You have a wide choice. Are you going to Cap d'Agde, Vias, Valras Plage or Narbonne Plage? Or take one of the more southerly villages like Port Leucate, Canet Plage or Saint Cyprien?
Are you going to take a quiet day and sunbathe? Or do you rent a jet ski for an hour to go to the sea under supervision? There are also day trips from various places to make water to eg Spain. In regular boats or a catamaran. Walk also a village. Visit the boutiques and have a nice cup of coffee on one of the cozy terraces.
If you have set off early, you may want to consider going to one of the following places: Argeles sur Mèr, Port Vendres, Banyuls or Collioure. Collioure is called the St. Tropez of the Languedoc. If you have the time, you can then drive back half way through the mountains via Quillan to Carcassonne.