It's currently summer in Australia so during the day it would be too hot to wear, but it's ideal for an evening stroll on the beach, out to dinner or a late night trip to the ice creamery!
I bought the dress from New Look last summer. If it's not available I'm sure they do the same dress in a different print, or there will be loads out there from different shops. It was inexpensive (under £20) but really well made and the quality feels amazing.
I tend to roll the sleeves up a couple of times for a casual look, but they are full length so either would look good. I wear the dress with the top few buttons open. There's a draw string in the middle that looks great done up slightly, or loose.