Best beaches in Poseidonia

1 ranked beach in Poseidonia, Syros

Ranked by the OnlyBeaches Index (OBI) — a 1-10 score blending water purity, conditions, crowd levels and vibe. Updated every 30 minutes.

All beaches in Poseidonia

1
Poseidonia Beach
Small scenic beach near Poseidonia, great for peace and swimming
7.0

What makes Poseidonia's beaches stand out?

Poseidonia sits in Syros, Greece and is home to 1 ranked beach on OnlyBeaches. Every beach here is scored by the OnlyBeaches Index — a 1-10 metric blending water purity, live conditions (waves, water temperature, wind), crowd intelligence and vibe.

Whether you're after the highest-scoring beach in Poseidonia or a quieter hidden cove, the list above is refreshed every 30 minutes using live Stormglass and OpenWeather data.