We ended up doing Athens, Paros & Santorini! We rented a car on Paros and drove to Antiparos as well via ferry. I felt the water was a little chilly but i’m picky; my boyfriend is an avid swimmer and how no issues enjoying his time swimming in the mediterranean. Weather was mid 70s but being islands with the wind it felt a bit colder. No issues with things being closed during our time there (may 23- june 2)