It is really difficult to choose only 10 beach bars in Greece because there are numerous wonderful places by the sea. However, The Guardian managed to pick the top 10 of the beach bars in Greece:
Tinos Surf Lessons, Tinos, Cyclades
At Kolibithra Beach, something fun and friendly creates an alternative scenery in this stunning beach. A VW campervan converted into a bar, driftwood furniture and umbrellas woven by local basket-makers have as a result a cozy atmosphere where you can drink cocktails, eat crepes and salads and enjoy the windiest beach in Tinos.

Kolympithra Beach
Kavos Lounge Bar, Skyros, Sporades
In Kavos Lounge Bar, you can dive straight into the sea, from steeped terraces built literally in the rocks. The island of Skyros and especially this bar is ideal for backpackers, who search for adventure.
Isalos Bar, Sifnos, Cyclades
At the end of the loveliest beaches in Sifnos, Kamares, Isalos is a funky beach bar where you can relax with the sound of afrobeats. The food and the cocktails are a must.
Kalofego, Koufonisi, Cyclades
In Pori, the astonishing beach of Koufonisi with the golden sand and the turquoise waters, the best asset is the beach restaurant Kalofeggo, a small, modern restaurant in Mexican style with delicious creative Greek cuisine in an elegant atmosphere that left you speechless.

Pori Beach
Asteria Bar, Syros, Cyclades
Along the water's edge on Asteria Beach, you can find the glorified canteen with wooden tables and director's chairs. The view of the neoclassical villas of Ermoupolis Syros is magnificent, the water is crystal clear, and everyone is very friendly.
Hydronetta Bar, Hydra, Saronic Islands
On Hydra, there are no proper beaches. You just find a rock to lie on and dive off. Below the cannons, one of the best spots is Hydronetta with a perfect view of the impressive harbour. The sunsets from there are just amazing, but the bar is also popular at night.
George's Place, Patmos, Dodecanese
At Kampos beach in Patmos, this traditional, old-fashioned beach bar has something unique. Hippies, Athenians and athletic teens create an excitable crowd, and things are even better in the full-moon parties.
Ben's Bar, Paxoi, Ionian Islands
At Monodendri beach, the Ben's Bar has feel-good music and delicious food. Wood-fired pizzas, canoes, killer mojitos and hammocks hang between the trees are exactly what you need to relax and enjoy the emerald waters of Paxoi.
Limanakia Vouliagmenis Bar, Athens
Between the coastal suburbs of Vouliagmeni and Varkiza, this bar, built inside the rocks is open 24 hours. During the day, you can swim in the incredibly clear waters and at night drink cold beer with the stars reflected in the sea. It is really hard to believe that the bar is not on an island.

Limanakia in Voulaigmeni
Cantinais Bar, Trizina, Peloponnese
On a hillside overlooking the pale pebble beach of Votsalakia in Saronic Gulf, near the ancient theatre of Epidavros, a converted caravan serves as a kitchen and bar, and the beach bar stays open until late with lounge, reggae and jazz music.