Hotels in particular can be pricey, partly because the city center is quite compact and places with good locations can get away with charging quite a bit. There are several new hostels, a few near the foot of the Acropolis, so if you are on a tight budget you might consider those, whether in a dorm or private room.
Athens hotels don’t change prices much throughout the year, with the exception of some of the more posh places. The low season is generally from October through mid March, but even then things stay pretty busy so it’s hard to find a great deal.
The high season for Athens hotels runs from mid March through September, and even though the city is nearly unbearable during the height of summer, enough holidaymakers come through for a few days on their way to and from the islands that hotels keep their prices high.
Generally speaking, hotels in Athens tend to be more expensive than most people would expect, so it’s a good idea to research in advance online and look for a good deal on a highly rated place, since finding a bargain once you arrive could mean a lot of walking and disappointment.