In reply to alex505c:
Yeah, as previous poster said, better to go swimming or surfing. The water is warmer than it has been in many years for the time of year and the has been very little incoming swell so it is also crystal clear in places.
Places like Bosi will dry quick since they face the prevailing wind, more than as a result of being granite. Granite is as minging to climb as any type of rock in the wet unfortunately. Lots of other cliffs that will dry quick after rain, Trewavas for example.
If you're happy bouldering then look to tidal venues since they get wet twice a day anyway, so obvs dry quick, Godrevy being a good example of this.
Good luck. The forecast might look a bit ming at the moment, but it probably won't be wall to wall mizzle; probably.