It was super nice up there. No fog, a little wind. June is nice, i.e. warmer.
I like it up there in October with the cool air and super clear skies.
Yes the geology is pretty cool there. Well not cool when you are ab diving and trying to pop off what you think is an ab, but really a cobble. Stupid rocks.
My only issue about the north coast is a lack of rock climbing. Granted, there is stuff south near Ft Ross.