No more grey sand!
The problem with beaches (or snowy landscapes, or any scene where there’s a lot of white or light colors) is that they mislead camera meters.
An automatically exposed image will be too dark. But you easily can trick your camera into getting the right exposure when the sun is bright and the sky is blue.
What you need: An SLR or any compact camera, as long as it has an exposure lock option.
If your camera has manual exposure mode:
1. Choose manual exposure if you've got it.
I do this whenever I shoot at the beach, and I get perfect exposures every time. Now you can, too!