The bay window includes a semi-circle at the top which has no practical means to cover. Especially during the summer, the sun has a direct line-of-sight to where my computer sits. Fortunately, I have a nice-sized monitor and a chair that reclines. However, this is not the most comfortable way to write. Meanwhile, I can feel my forehead baking.
It's only a problem for a couple of months because of how the sun sets closer to north than west around the time of the Summer Solstice (which is less than four days away) up here.