In reply to AlisonSmiles: Beware of surfing, it will distract you from climbing!
But it's a good activity for weekends when there's no-one else around or the weather's crap.
Sept-Oct are top times, better than summer when waves are small and winter when waves are big. Water is warmest then too.
From Manchester, (was it?) consider Lleyn, Hell's mouth is pretty consistent and closer than pembroke. Thyere's a surf shop in Abersoch and lessons available, it's a dash down the expressway, you could probably do it in three hours. if you get your own board it's even possible to surf quite near Caernarvon, on a good day.
The other big place where I did a fair bit was Gower, there's a good surf school and a bif beach at the far west, Rhossili, but the school and surf is based at the N end, name escapes me, Llansomething.
I have been buggering about with it for 3-4 years now and am still crap, but I am a relatively old geezer, and it's loads of fun even if you're rubbish. Hope this helps.