We stayed here in the first week of October - the Croatian season ends with a bang at the end of September, presumably because the weather is unstable after then. But we had perfect weather, and a hotel that was only partially occupied - as a result of which we were upgraded to a premium room with a small balcony overlooking the promenade and stony beach. If "promenade" makes it sound in a busy location, it isn't - Orebic itself is small and quiet (and wonderful for it too), and the hotel is slightly out of the centre, some 12 minutes walk to the port, from which the ferry to Korcula (a lovely old town, if a bit touristy) takes around 20 minutes.
The hotel has a good but smallish indoor pool, and a health centre - not that we used either. The restaurant is very good, and reasonably priced - both of the evening meals we ate there exceeded our expectations. The staff were delightful.
A great place for a few days' stopover if you are visiting the Dalmatian coast - and ideally located between Split/Trogir on the one hand, and Dubrovnik on the other. We had hired a car to get from the former to the latter - you could just as easily take the ferry for both legs, although then you wouldn't get to see Ston, which is a small town whose walls run up the surrounding mountainsides, giving you a strenuous walk with lovely views.
What a great country !