I have the same problem. I have to get into a shady spot and make sure that whats behind me (which will be reflected on the screen) is dark. Shrubs are good.
My old laptop had the matte screen and I couldnt see the screen in daylight either.
A white background on the screen helps to read text. I cant see the windows desktop to save my life no matter how I tilt the screen, but I can read the forum.