Noun
day at the beach (plural days at the beach)
(informal, often in the negative) An easy and pleasant task or situation.
I'm no day at the beach. And if it is a beach, it's Hampton Beach. Ever been there? It's not nice. Denis Leary
The prospect of a long day at the beach makes me panic. There is no harder work I can think of than taking myself off to somewhere pleasant, where I am forced to stay for hours and 'have fun'. Phillip Lopate