I'm glad I waited to harvest the watermelon, because it's gotten bigger and a lot darker since then. I'm not sure how much longer I can wait though!
My rockmelons are filling out too, they have a long way to go though. They're not a dwarf type, they should get to full size eventually.
Right now it's just a race against time, as the weather is cooling and still humid and damp. The watermelon's already looking wilted, which probably means it's got something fungal. The rockmelon vine is still very healthy though.