In reply to Will Hunt:
Hi Will.
I was out climbing in a t-shirt last Saturday, so as late March goes, the weather could be stunning, or on the other hand we could be back to the maelstrom of the past few weeks.
Any crags that suffer from seepage will be in reasonably poor condition right now, but there's plenty that doesn't and that dries quick in a few hours. Anything in the sun and/or the wind will dry quickly. Basically, you'll be alright in Penwith, assuming you don't want to do stuff in places like The Great Zawn/too many of the north Penwith obscurities. Likewise, if Carn Gowla is on your hit list, I wouldn't bother.
As you say, the ground is very waterlogged at the moment. To give you some idea, I generally photograph the local league football every weekend down here, but we've had weeks of match postponements in a row where pitches have been flooded. As soon as it rains, farmers' fields start draining onto the road as there's nowhere else for it to go, the water table being so high. That said, another month and things could be very different. I camped the other night and it was fine, we survived
As for the seas being too big, well there have been waves hitting Sennen (and every other cliff!) down here in recent weeks that have been producing spray two to three times the height of the crag, so it's a distinct possibility - then again it could be flat.
Like winter climbing, all the caveats apply I'm afraid
Good luck. I hope you get the weather. If you do, you'll have a great time.
Cheers,
Tom