In reply to Ourmother: North Devon for sure. Got numerous large and small bays for surf kayaking, such as Croyde, Woolacombe, Saunton. Then a few minutes walk from Croyde there is Baggy Point sea cliff climbing (and plenty of others a short drive away).
Plenty of campsites that will be cheap as chips (maybe a bit soggy too!) this time of year.
You can head a bit further if you base yourself there, as you've got Dartmoor about an hour away, and plenty of rivers for the Kayaks to play in. If the weather is totally pants, there are indoor walls at South Molton (The Mill) and Bude (The Barn).
I moved away from North devon last year, but get back for all of the above whenever i can!
Hope that helps