Ill-advised time for an ocean swim (5)

I believe the answer is:

night

(Other definitions for night that I've seen before include "'The 2 8 of the dog in the _____'" , "Evening" , "Opposite of day" , "Darkness; see you in the morning" , "8d [DARKNESS]" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.