From 03/05/2018, until 31/08/2018 the Archaeological Site, the Stadium and the Museum of Nemea operate on extended hours (08: 00-20: 00, open all days of the week)
6/3, 18/4, 18/5, 5/6, 28/10
last weekend of September,
1st Sunday of each month from 1/11 until 31/3.
The sites and the Museum are closed on the second day of Christmas, on the 1st day of the year, on March 25th, on the first of May and Easter Day.