Read the catch reports regularly - you'll get a good idea of what is fishing and when.
This time of year, I do like the Wansbeck estuary and mouth for flatties, blyth pier for mackeral.
For a bit of fun get a little rod and reel from somewhere like the pound shop, some small floats and very light line - go fish a rockpool with tiny hooks (crimp the barbs so you can release easily).... sounds daft but I used to love doing that, some beautiful small species in them. Couple of nice deep pools at S/Sluice we used to go to in the summer. Take a camera that can take good macro close-up shots, see how fast your species catch list grows!