This 24 C probably is correct for a flu. But not for this Corona virus. This is not a flu. Corona viruses can stay alive until approx 37 C.
But nevertheless 24 C is great to enjoy the sun. Here its cold right now.
I visited quit a few Greek islands, but somehow I missed Salamis.
doctors in milan's hospital say coronavirus cannot survive 23 celsius.
btw, you missed nothing. salamina is not a turistic place. it is just a suburb of piraeus. there are nice places to visit but not for holliday.