My DD wasn't real fussed about being wrapped from a few weeks old so I didn't wrap her. She slept the same length of time whether she was wrapped or not.

At about 4-5 months she was smacking herself in the head and waking herself up at night so I started wrapping again. What they prefer or need can chop and change. If it is hot and you think you can get away without it give it a go, it might just work.