Try logging on to ST VEDAS SURF SHOP. They have a web cam at Coldingham Bay. Look in the right hand column menu, and you'll see an option :Live Web Cam. Click on this and you get a live moving picture of the surf. OK I know it's about 70 miles North of Tynemouth, but it does give you an idea of what the sea conditions are like.
I use it all the time and find it to be very reliable.
Hope it is of use to you as well.