Oh, I haven't had a lot of high temps with the poly interior but I do remember people with reservations about the surface being too hot. I've only taken the boat out 3 times and 1 of those times the temps were in the low to mid 80s. Being out baking in the sun, the surface was just warm. I could put my hand and feet onto it without issue. Now the seats. Those ****ers were blazing hot. Too hot to touch.