Aria Seaside Hotel, also presented as Aria Seaside Retreat, is a three-star family hotel on Paradeisos Beach in Neos Marmaras, Sithonia, Chalkidiki, Greece. Set directly by the sea and surrounded by a garden, it welcomes guests seeking a relaxed coastal stay, from family holidays to romantic escapes. The hotel offers air-conditioned rooms and suites, some with views of the Aegean Sea or surrounding mountains, in a range of sizes and layouts for couples and groups.

A Greek breakfast is included with reservations, and guests can also enjoy food and drinks at the bar-restaurant. Sun loungers and umbrellas are available on the beach with bar-restaurant consumption. Other amenities include free Wi-Fi, complimentary parking, and a garden playground.

Nearby taverns and shops are within walking distance, while the hotel promotes local activities such as walking routes, cycling tours, diving, and cruises around Sithonia and Mount Athos. Aria Seaside Hotel is a member of the Halkidiki Hotel Association and Hellenic Chamber of Hotels, and is certified as a Bike Friendly Hotel