Persanally, I always go by what Basher says.

Web:www.bigsalty.co.uk

There is also www.bigsalty.co.uk
which (according to the fella at concept sails, whose mate wrote it) is a combination of six different forecasts.
Anyway it seems better than some and was close to the mark last 2 times I was out.

Web:2xs

2xs at west wittering have a nice camera and some stats on their local waves, tide and wind. Some real time camera footage can be interesting.