>>>I dont think a dark blue cover will ever get hot enough to damage your hulls, but you could always put a thermometer under them and measure it and report back.

>>>Uncovered under the hot sun is bad too, so unless it gets above 200 under the cover, I wouldnt worry about it.


You may be right, because now that I think about it, there are boats that have been made of dark colors, so I guess it's probably ok. But the blue cover definitely gets quite hot when left out in direct sun light in say August. I may try to measure the surface temp this summer. It's definitely hot to the touch, but it cools off quickly once the white hull is exposed.

On the flip side, virtually all good surfboard / windsurf board bags have one side that is made of silver reflective material for the sole purpose of reflecting sunlight and minimizing heat gain. Boards are essentially made of the same materials as my Hobie.

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