Beach
Agios Stefanos
Commune of Mykonos, Greece · sea 23.8 °C at its warmest, in August

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Agios Stefanos (Gr. Άγιος Στέφανος meaning Saint Stephen) is a sandy beach next to Tourlos, the new harbor of Mykonos. It is located 3.5 km from Mykonos town.
Questions
How warm is the sea at Agios Stefanos?
The sea off Agios Stefanos averages 23.8 °C at its warmest, in August, and 15.7 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Agios Stefanos?
The sea reaches 20 °C or more from June to October. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Agios Stefanos?
Agios Stefanos is on the coast of Commune of Mykonos, Greece, at 37.4689, 25.3194. The map on this site flies straight to it.