In reply to Owen W-G:
Tirpentwys is supposed to be pretty good, if you're to the east. Gilwern I can vouch for - dries very quickly, and the two parts of the crag face different directions so there's usually some sun to be had. When I lived in Swansea there were a few crags on Gower that were quite good, but are all pretty cold if the sun isn't out and the wind is blowing - Trial Wall at Rhossili (not that much quality stuff but plenty to go at for mileage - although it's worth checking the SWMC wiki as some decent stuff has been put up since the Rockfax guide came out, especially White Noise (6c+) if you don't mind a little crunchiness), Third Sister (long walk-in by sport standards and the routes there are a little over-starred), Bowen's Parlour, and Bosco's Gulch (both tidal but good suntraps).
Abbey Buttress is very quick-drying and Gaz 316 (6b+) is quite good, but I don't know that it's worth driving all that far for - possibly a good option if you're coming from the east and a Gower trip doesn't go to plan/you're not quite done. In the same area Dyffryn is supposed to be quick-drying but didn't seem that way when I visited, and the routes didn't look to be particularly inspiring.
Wyndcliff Quarry is obviously also good, although again the quality there isn't massively high. Tons to go at though, and I thought that Shin Gi Tai (6b+) and Diminishing Returns (6c) were both actually quite good, rather than simply passable.
