Kaş has several rocky (not sand) beaches but they are quite small, most are less than 10 metres wide. However the rock shelves are wonderful for sun and sea bathing. These are populated by cafes and restaurants which provide free loungers. In return you are expected (but not obliged) to buy drinks, snacks or food from them.
The town has many decent hotels and restaurants and is a bustling centre for adventure activity holidays. The main season is from April through the end of October. October 29th (Ekim yirmi dokuz) is Turkish Independence Day and the official end of the tourist season in Kaş. There is a huge celebration in the town square (meydan).
Kaş is a small town, and you can walk anywhere within 10 minutes. Scooters are available for rent around town , if you just can’t be bothered.
Minibuses run around the Peninsula of Çukurbağ, known in Turkish as Yarım Ada, which is a few kilometers away and where most hotels have their own terrace “beaches” open to the public (as long as beverages or food are consumed from their beach bars). Taxis to the peninsula can be costly, at least US $10 each way.
Transportation in Turkey is excellent. You can take a minibus (or dolmuş) up to the village of Çukurbağ, about 10 km directly above and behind Kaş and on to places such as Kekova or Kalkan on either side of Kaş.