My daughter and I were there about a month ago. I have been in November too, years ago. One day I will go in the summer or spring. I know the weather won’t be really great , but then I wouldn’t expect it to be. Believe it or not, the weather was great last month, but by great, I mean snow included.
We loved the blue lagoon and would definitely go back ! Make sure to really go heavy with the conditioner they provide and maybe even have some type of hair oil ( like argan type ) for your hair afterwards.
I would absolutely love to do the snorkeling and volcanic helicopter excursion…or even take a day trip to Greenland 