In reply to Elsier:
> I was also wondering about the bouldering on the Aberdeen sea cliffs? Don't know very much about the bouldering there, but I'm guessing it dries quickly and is sheltered in a westerly wind?
As has been mentioned, Portlethen (Craigmarroin) and Boltsheugh are probably your best bets for sheltered bouldering in winter. In fact, on a sunny winter's morning, both venues can be properly toasty! You might also want to bring your rope and quickdraws for the sport climbing at Boltsheugh (some of the routes are short enough to be considered bolted bouldering!).
Portlethen is the more extensive of the two, with a mixture of sea-washed boulders and sharper walls above the high tide line. Problems are generally short, some have almost ridiculously low sit starts but there are also a few that are getting into highball territory. There's plenty to go at below Font 6c for at least a couple of visits.
Boltsheugh problems tend to be eliminates and to start with, it can be hard to work out what's in and what's out. However, there's a lot of steep rock with big holds on the upper tier, so if you enjoy simply moving on rock, it's good fun. The UKC logbooks include links to some Vimeo videos showing the lines of problems on the lower section.
It's 5-10 mins drive from Boltsheugh to Portlethen so you could easily check out both areas on a reconnaissance visit. Both areas dry quickly, particularly the free-standing boulders at Portlethen. Portlethen is partly tidal, and neither would be a good option in high seas.