Watermelon?
It depends on your doc's plan. Some recommend waiting a bit to add fruits. And I don't know if pureed watermelon would be very appetizing to me, even if it was ok with my doc.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.
Watermelon is pretty high in natural sugar. My surgeon's office nixed watermelon, pineapple and grapes until we could tolerate the sugar in them, as they are all high sugar fruits. I can have a bit now, a piece or two is very refreshing after a meal when you can't have a drink. I would likely wait though, unless your plan says its fine.
I am 7mo VSG. I was told no fruits for almost a year BUT 3 months out my NUT said berries are okay sometimes.
I had 2 pieces of watermelon about 2 weeks ago and my tiny tummy didn't totally like it. It just kept making me gurgle burp randomly and tasted like watermelon and also made me feel full.
My tiny tummy can handle 95% of what I feed it *knock on wood* which I lucked out! So for RNY I am not positive but I would stay away for longer.