Black Sunbrella + sun =dry boat. Although I don't put the cover on if it is really wet. I just replaced the original 94 sun tells on mine the year before last. Went w sunbrella again. Sits on uncovered hoist all summer. I've debated a canopy for the hoist but like the fact the boat is super dry.
It does get really hot though. I use mine mornings for the most part, so not a big deal. On the days we use during the day, need to take the cover off and let it cool a bit or be careful, maybe splash some water on the seats. The metal window frame and other stuff is crazy hot.